diff --git a/01-Image_Modalities.html b/01-Image_Modalities.html
index bb6423e..9b6c1b1 100644
--- a/01-Image_Modalities.html
+++ b/01-Image_Modalities.html
@@ -451,7 +451,7 @@ <h3 class="callout-title">pulse sequence parameters and image contrast</h3>
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   <h4 class="accordion-header" id="headingSolution1"> Show me the solution </h4>
 </button>
-<div id="collapseSolution1" class="accordion-collapse collapse" aria-labelledby="headingSolution1" data-bs-parent="#accordionSolution1">
+<div id="collapseSolution1" class="accordion-collapse collapse" data-bs-parent="#accordionSolution1" aria-labelledby="headingSolution1">
 <div class="accordion-body">
 <p>Repetition time (TR) and echo time (TE) are the two pulse sequence
 parameters that dictate the T1w and T2w image contrasts. TR &gt; TE.</p>
@@ -493,7 +493,7 @@ <h3 class="callout-title">Tissue type and image contrast</h3>
 <button class="accordion-button solution-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSolution2" aria-expanded="false" aria-controls="collapseSolution2">
   <h4 class="accordion-header" id="headingSolution2"> Show me the solution </h4>
 </button>
-<div id="collapseSolution2" class="accordion-collapse collapse" aria-labelledby="headingSolution2" data-bs-parent="#accordionSolution2">
+<div id="collapseSolution2" class="accordion-collapse collapse" data-bs-parent="#accordionSolution2" aria-labelledby="headingSolution2">
 <div class="accordion-body">
 <p>White Matter (i.e. axonal tracts)</p>
 </div>
@@ -663,7 +663,7 @@ <h3 class="callout-title">Key Points</h3>
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   "dateCreated": "2024-10-22",
   "dateModified": "2024-02-19",
-  "datePublished": "2024-12-24"
+  "datePublished": "2024-12-31"
 }
 
   </script><script>
diff --git a/02-Image_Cleanup.html b/02-Image_Cleanup.html
index 145218a..3c25c67 100644
--- a/02-Image_Cleanup.html
+++ b/02-Image_Cleanup.html
@@ -420,7 +420,7 @@ <h3 class="callout-title">Bias field correction quiz</h3>
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   <h4 class="accordion-header" id="headingSolution1"> Show me the solution </h4>
 </button>
-<div id="collapseSolution1" class="accordion-collapse collapse" aria-labelledby="headingSolution1" data-bs-parent="#accordionSolution1">
+<div id="collapseSolution1" class="accordion-collapse collapse" data-bs-parent="#accordionSolution1" aria-labelledby="headingSolution1">
 <div class="accordion-body">
 <p>Bias field is modeled as multiplicative factor, whereas noise is
 typically assumed as additive and spatially independent (Gaussian)
@@ -552,7 +552,7 @@ <h3 class="callout-title">Brain extraction quiz</h3>
 <button class="accordion-button solution-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSolution2" aria-expanded="false" aria-controls="collapseSolution2">
   <h4 class="accordion-header" id="headingSolution2"> Show me the solution </h4>
 </button>
-<div id="collapseSolution2" class="accordion-collapse collapse" aria-labelledby="headingSolution2" data-bs-parent="#accordionSolution2">
+<div id="collapseSolution2" class="accordion-collapse collapse" data-bs-parent="#accordionSolution2" aria-labelledby="headingSolution2">
 <div class="accordion-body">
 <p>Brain mask at this stage only offers a crude estimate about total
 brain volume. It can be used for quality control (e.g. detecting
@@ -697,7 +697,7 @@ <h3 class="callout-title">Key Points</h3>
   "identifier": "https://carpentries-incubator.github.io/SDC-BIDS-sMRI/02-Image_Cleanup.html",
   "dateCreated": "2024-10-22",
   "dateModified": "2024-02-19",
-  "datePublished": "2024-12-24"
+  "datePublished": "2024-12-31"
 }
 
   </script><script>
diff --git a/03-Image_Spatial_Normalization.html b/03-Image_Spatial_Normalization.html
index 21f275b..f46412c 100644
--- a/03-Image_Spatial_Normalization.html
+++ b/03-Image_Spatial_Normalization.html
@@ -768,7 +768,7 @@ <h3 class="callout-title">Key Points</h3>
   "identifier": "https://carpentries-incubator.github.io/SDC-BIDS-sMRI/03-Image_Spatial_Normalization.html",
   "dateCreated": "2024-10-22",
   "dateModified": "2024-02-19",
-  "datePublished": "2024-12-24"
+  "datePublished": "2024-12-31"
 }
 
   </script><script>
diff --git a/04-Image_Quantification.html b/04-Image_Quantification.html
index 5b0c3bf..d10a619 100644
--- a/04-Image_Quantification.html
+++ b/04-Image_Quantification.html
@@ -1018,7 +1018,7 @@ <h3 class="callout-title">Key Points</h3>
   "identifier": "https://carpentries-incubator.github.io/SDC-BIDS-sMRI/04-Image_Quantification.html",
   "dateCreated": "2024-10-22",
   "dateModified": "2024-02-19",
-  "datePublished": "2024-12-24"
+  "datePublished": "2024-12-31"
 }
 
   </script><script>
diff --git a/05-Image_QC.html b/05-Image_QC.html
index 7fb4544..04f819b 100644
--- a/05-Image_QC.html
+++ b/05-Image_QC.html
@@ -506,7 +506,7 @@ <h3 class="callout-title">Key Points</h3>
   "identifier": "https://carpentries-incubator.github.io/SDC-BIDS-sMRI/05-Image_QC.html",
   "dateCreated": "2024-10-22",
   "dateModified": "2024-02-19",
-  "datePublished": "2024-12-24"
+  "datePublished": "2024-12-31"
 }
 
   </script><script>
diff --git a/06-Statistical_Analysis.html b/06-Statistical_Analysis.html
index 385b128..e43d0fa 100644
--- a/06-Statistical_Analysis.html
+++ b/06-Statistical_Analysis.html
@@ -574,7 +574,7 @@ <h4 class="accordion-header" id="headingSolution1">
   Hint
   </h4>
 </button>
-<div id="collapseSolution1" class="accordion-collapse collapse" data-bs-parent="#accordionSolution1" aria-labelledby="headingSolution1">
+<div id="collapseSolution1" class="accordion-collapse collapse" aria-labelledby="headingSolution1" data-bs-parent="#accordionSolution1">
 <div class="accordion-body">
 <p>Use the Freesurfer LUT to identify the correct ROI index. For the
 lateral ventricle, make sure you use the appropriate tissue type to
@@ -839,7 +839,7 @@ <h4 class="accordion-header" id="headingSolution2">
   Hint
   </h4>
 </button>
-<div id="collapseSolution2" class="accordion-collapse collapse" data-bs-parent="#accordionSolution2" aria-labelledby="headingSolution2">
+<div id="collapseSolution2" class="accordion-collapse collapse" aria-labelledby="headingSolution2" data-bs-parent="#accordionSolution2">
 <div class="accordion-body">
 <p>You’ll need to use your <code>pandas</code>-fu for this exercise.
 Check for NA (aka missing) values in your <code>pandas</code> dataframe.
@@ -868,7 +868,7 @@ <h4 class="accordion-header" id="headingSolution3">
   Hint
   </h4>
 </button>
-<div id="collapseSolution3" class="accordion-collapse collapse" data-bs-parent="#accordionSolution3" aria-labelledby="headingSolution3">
+<div id="collapseSolution3" class="accordion-collapse collapse" aria-labelledby="headingSolution3" data-bs-parent="#accordionSolution3">
 <div class="accordion-body">
 <p>Data imputation can be applied to appropriate columns, with the
 <code>fillna()</code> method. You may be interested in the
@@ -1166,7 +1166,7 @@ <h4 class="accordion-header" id="headingSolution4">
   Hint
   </h4>
 </button>
-<div id="collapseSolution4" class="accordion-collapse collapse" data-bs-parent="#accordionSolution4" aria-labelledby="headingSolution4">
+<div id="collapseSolution4" class="accordion-collapse collapse" aria-labelledby="headingSolution4" data-bs-parent="#accordionSolution4">
 <div class="accordion-body">
 <p>You can have a look at the outputs generated by
 <code>smriprep/fmriprep</code>.</p>
@@ -1601,7 +1601,7 @@ <h3 class="callout-title">Key Points</h3>
   "identifier": "https://carpentries-incubator.github.io/SDC-BIDS-sMRI/06-Statistical_Analysis.html",
   "dateCreated": "2024-10-22",
   "dateModified": "2024-02-19",
-  "datePublished": "2024-12-24"
+  "datePublished": "2024-12-31"
 }
 
   </script><script>
diff --git a/07-Reproducibility.html b/07-Reproducibility.html
index b38257d..7373324 100644
--- a/07-Reproducibility.html
+++ b/07-Reproducibility.html
@@ -490,7 +490,7 @@ <h3 class="callout-title">Key Points</h3>
   "identifier": "https://carpentries-incubator.github.io/SDC-BIDS-sMRI/07-Reproducibility.html",
   "dateCreated": "2024-10-22",
   "dateModified": "2024-02-19",
-  "datePublished": "2024-12-24"
+  "datePublished": "2024-12-31"
 }
 
   </script><script>
diff --git a/404.html b/404.html
index 3575e32..94af356 100644
--- a/404.html
+++ b/404.html
@@ -385,8 +385,8 @@ <h1>Page not found</h1>
   "url": "https://carpentries-incubator.github.io/SDC-BIDS-sMRI/404.html",
   "identifier": "https://carpentries-incubator.github.io/SDC-BIDS-sMRI/404.html",
   "dateCreated": "2024-10-22",
-  "dateModified": "2024-12-24",
-  "datePublished": "2024-12-24"
+  "dateModified": "2024-12-31",
+  "datePublished": "2024-12-31"
 }
 
   </script><script>
diff --git a/CODE_OF_CONDUCT.html b/CODE_OF_CONDUCT.html
index 3871936..0c33e71 100644
--- a/CODE_OF_CONDUCT.html
+++ b/CODE_OF_CONDUCT.html
@@ -404,7 +404,7 @@ <h1>Contributor Code of Conduct</h1>
   "identifier": "https://carpentries-incubator.github.io/SDC-BIDS-sMRI/CODE_OF_CONDUCT.html",
   "dateCreated": "2024-10-22",
   "dateModified": "2024-02-19",
-  "datePublished": "2024-12-24"
+  "datePublished": "2024-12-31"
 }
 
   </script><script>
diff --git a/LICENSE.html b/LICENSE.html
index 6025385..8bb5a0b 100644
--- a/LICENSE.html
+++ b/LICENSE.html
@@ -452,7 +452,7 @@ <h1>Licenses</h1>
   "identifier": "https://carpentries-incubator.github.io/SDC-BIDS-sMRI/LICENSE.html",
   "dateCreated": "2024-10-22",
   "dateModified": "2024-02-19",
-  "datePublished": "2024-12-24"
+  "datePublished": "2024-12-31"
 }
 
   </script><script>
diff --git a/aio.html b/aio.html
index 8d8bf7c..6b5f86b 100644
--- a/aio.html
+++ b/aio.html
@@ -513,7 +513,7 @@ <h3 class="callout-title">pulse sequence parameters and image contrast</h3>
 <button class="accordion-button solution-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSolution1" aria-expanded="false" aria-controls="collapseSolution1">
   <h4 class="accordion-header" id="headingSolution1"> Show me the solution </h4>
 </button>
-<div id="collapseSolution1" class="accordion-collapse collapse" aria-labelledby="headingSolution1" data-bs-parent="#accordionSolution1">
+<div id="collapseSolution1" class="accordion-collapse collapse" data-bs-parent="#accordionSolution1" aria-labelledby="headingSolution1">
 <div class="accordion-body">
 <p>Repetition time (TR) and echo time (TE) are the two pulse sequence
 parameters that dictate the T1w and T2w image contrasts. TR &gt; TE.</p>
@@ -575,7 +575,7 @@ <h3 class="callout-title">Tissue type and image contrast</h3>
 <button class="accordion-button solution-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSolution2" aria-expanded="false" aria-controls="collapseSolution2">
   <h4 class="accordion-header" id="headingSolution2"> Show me the solution </h4>
 </button>
-<div id="collapseSolution2" class="accordion-collapse collapse" aria-labelledby="headingSolution2" data-bs-parent="#accordionSolution2">
+<div id="collapseSolution2" class="accordion-collapse collapse" data-bs-parent="#accordionSolution2" aria-labelledby="headingSolution2">
 <div class="accordion-body">
 <p>White Matter (i.e. axonal tracts)</p>
 </div>
@@ -850,7 +850,7 @@ <h3 class="callout-title">Bias field correction quiz</h3>
 <button class="accordion-button solution-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSolution1" aria-expanded="false" aria-controls="collapseSolution1">
   <h4 class="accordion-header" id="headingSolution1"> Show me the solution </h4>
 </button>
-<div id="collapseSolution1" class="accordion-collapse collapse" aria-labelledby="headingSolution1" data-bs-parent="#accordionSolution1">
+<div id="collapseSolution1" class="accordion-collapse collapse" data-bs-parent="#accordionSolution1" aria-labelledby="headingSolution1">
 <div class="accordion-body">
 <p>Bias field is modeled as multiplicative factor, whereas noise is
 typically assumed as additive and spatially independent (Gaussian)
@@ -1016,7 +1016,7 @@ <h3 class="callout-title">Brain extraction quiz</h3>
 <button class="accordion-button solution-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSolution2" aria-expanded="false" aria-controls="collapseSolution2">
   <h4 class="accordion-header" id="headingSolution2"> Show me the solution </h4>
 </button>
-<div id="collapseSolution2" class="accordion-collapse collapse" aria-labelledby="headingSolution2" data-bs-parent="#accordionSolution2">
+<div id="collapseSolution2" class="accordion-collapse collapse" data-bs-parent="#accordionSolution2" aria-labelledby="headingSolution2">
 <div class="accordion-body">
 <p>Brain mask at this stage only offers a crude estimate about total
 brain volume. It can be used for quality control (e.g. detecting
@@ -2653,7 +2653,7 @@ <h4 class="accordion-header" id="headingSolution1">
   Hint
   </h4>
 </button>
-<div id="collapseSolution1" class="accordion-collapse collapse" data-bs-parent="#accordionSolution1" aria-labelledby="headingSolution1">
+<div id="collapseSolution1" class="accordion-collapse collapse" aria-labelledby="headingSolution1" data-bs-parent="#accordionSolution1">
 <div class="accordion-body">
 <p>Use the Freesurfer LUT to identify the correct ROI index. For the
 lateral ventricle, make sure you use the appropriate tissue type to
@@ -2931,7 +2931,7 @@ <h4 class="accordion-header" id="headingSolution2">
   Hint
   </h4>
 </button>
-<div id="collapseSolution2" class="accordion-collapse collapse" data-bs-parent="#accordionSolution2" aria-labelledby="headingSolution2">
+<div id="collapseSolution2" class="accordion-collapse collapse" aria-labelledby="headingSolution2" data-bs-parent="#accordionSolution2">
 <div class="accordion-body">
 <p>You’ll need to use your <code>pandas</code>-fu for this exercise.
 Check for NA (aka missing) values in your <code>pandas</code> dataframe.
@@ -2960,7 +2960,7 @@ <h4 class="accordion-header" id="headingSolution3">
   Hint
   </h4>
 </button>
-<div id="collapseSolution3" class="accordion-collapse collapse" data-bs-parent="#accordionSolution3" aria-labelledby="headingSolution3">
+<div id="collapseSolution3" class="accordion-collapse collapse" aria-labelledby="headingSolution3" data-bs-parent="#accordionSolution3">
 <div class="accordion-body">
 <p>Data imputation can be applied to appropriate columns, with the
 <code>fillna()</code> method. You may be interested in the
@@ -3264,7 +3264,7 @@ <h4 class="accordion-header" id="headingSolution4">
   Hint
   </h4>
 </button>
-<div id="collapseSolution4" class="accordion-collapse collapse" data-bs-parent="#accordionSolution4" aria-labelledby="headingSolution4">
+<div id="collapseSolution4" class="accordion-collapse collapse" aria-labelledby="headingSolution4" data-bs-parent="#accordionSolution4">
 <div class="accordion-body">
 <p>You can have a look at the outputs generated by
 <code>smriprep/fmriprep</code>.</p>
@@ -3823,8 +3823,8 @@ <h3 class="callout-title">Key Points</h3>
   "url": "https://carpentries-incubator.github.io/SDC-BIDS-sMRI/aio.html",
   "identifier": "https://carpentries-incubator.github.io/SDC-BIDS-sMRI/aio.html",
   "dateCreated": "2024-10-22",
-  "dateModified": "2024-12-24",
-  "datePublished": "2024-12-24"
+  "dateModified": "2024-12-31",
+  "datePublished": "2024-12-31"
 }
 
   </script><script>
diff --git a/discuss.html b/discuss.html
index c6f7c9d..8b2daa1 100644
--- a/discuss.html
+++ b/discuss.html
@@ -397,7 +397,7 @@ <h1>Discussion</h1>
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   "dateCreated": "2024-10-22",
   "dateModified": "2024-02-19",
-  "datePublished": "2024-12-24"
+  "datePublished": "2024-12-31"
 }
 
   </script><script>
diff --git a/images.html b/images.html
index 11f70e8..125aad8 100644
--- a/images.html
+++ b/images.html
@@ -700,8 +700,8 @@ <h3 id="07-Reproducibility-figure-4">Figure 4</h3>
   "url": "https://carpentries-incubator.github.io/SDC-BIDS-sMRI/images.html",
   "identifier": "https://carpentries-incubator.github.io/SDC-BIDS-sMRI/images.html",
   "dateCreated": "2024-10-22",
-  "dateModified": "2024-12-24",
-  "datePublished": "2024-12-24"
+  "dateModified": "2024-12-31",
+  "datePublished": "2024-12-31"
 }
 
   </script><script>
diff --git a/index.html b/index.html
index eba4e77..42d8327 100644
--- a/index.html
+++ b/index.html
@@ -534,8 +534,8 @@ <h3 id="method-2-using-pyenv-linux-macos">Method 2: Using pyenv [Linux, MacOS]<a
   "url": "https://carpentries-incubator.github.io/SDC-BIDS-sMRI/index.html",
   "identifier": "https://carpentries-incubator.github.io/SDC-BIDS-sMRI/index.html",
   "dateCreated": "2024-10-22",
-  "dateModified": "2024-12-24",
-  "datePublished": "2024-12-24"
+  "dateModified": "2024-12-31",
+  "datePublished": "2024-12-31"
 }
 
   </script><script>
diff --git a/instructor-notes.html b/instructor-notes.html
index 7582d76..2256353 100644
--- a/instructor-notes.html
+++ b/instructor-notes.html
@@ -430,8 +430,8 @@ <h1>Instructor Notes</h1>
   "url": "https://carpentries-incubator.github.io/SDC-BIDS-sMRI/instructor-notes.html",
   "identifier": "https://carpentries-incubator.github.io/SDC-BIDS-sMRI/instructor-notes.html",
   "dateCreated": "2024-10-22",
-  "dateModified": "2024-12-24",
-  "datePublished": "2024-12-24"
+  "dateModified": "2024-12-31",
+  "datePublished": "2024-12-31"
 }
 
   </script><script>
diff --git a/instructor/01-Image_Modalities.html b/instructor/01-Image_Modalities.html
index 77c63ed..1f7ce96 100644
--- a/instructor/01-Image_Modalities.html
+++ b/instructor/01-Image_Modalities.html
@@ -453,7 +453,7 @@ <h3 class="callout-title">pulse sequence parameters and image contrast</h3>
 <button class="accordion-button solution-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSolution1" aria-expanded="false" aria-controls="collapseSolution1">
   <h4 class="accordion-header" id="headingSolution1"> Show me the solution </h4>
 </button>
-<div id="collapseSolution1" class="accordion-collapse collapse" aria-labelledby="headingSolution1" data-bs-parent="#accordionSolution1">
+<div id="collapseSolution1" class="accordion-collapse collapse" data-bs-parent="#accordionSolution1" aria-labelledby="headingSolution1">
 <div class="accordion-body">
 <p>Repetition time (TR) and echo time (TE) are the two pulse sequence
 parameters that dictate the T1w and T2w image contrasts. TR &gt; TE.</p>
@@ -495,7 +495,7 @@ <h3 class="callout-title">Tissue type and image contrast</h3>
 <button class="accordion-button solution-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSolution2" aria-expanded="false" aria-controls="collapseSolution2">
   <h4 class="accordion-header" id="headingSolution2"> Show me the solution </h4>
 </button>
-<div id="collapseSolution2" class="accordion-collapse collapse" aria-labelledby="headingSolution2" data-bs-parent="#accordionSolution2">
+<div id="collapseSolution2" class="accordion-collapse collapse" data-bs-parent="#accordionSolution2" aria-labelledby="headingSolution2">
 <div class="accordion-body">
 <p>White Matter (i.e. axonal tracts)</p>
 </div>
@@ -665,7 +665,7 @@ <h3 class="callout-title">Key Points</h3>
   "identifier": "https://carpentries-incubator.github.io/SDC-BIDS-sMRI/instructor/01-Image_Modalities.html",
   "dateCreated": "2024-10-22",
   "dateModified": "2024-02-19",
-  "datePublished": "2024-12-24"
+  "datePublished": "2024-12-31"
 }
 
   </script><script>
diff --git a/instructor/02-Image_Cleanup.html b/instructor/02-Image_Cleanup.html
index 5193516..a795988 100644
--- a/instructor/02-Image_Cleanup.html
+++ b/instructor/02-Image_Cleanup.html
@@ -422,7 +422,7 @@ <h3 class="callout-title">Bias field correction quiz</h3>
 <button class="accordion-button solution-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSolution1" aria-expanded="false" aria-controls="collapseSolution1">
   <h4 class="accordion-header" id="headingSolution1"> Show me the solution </h4>
 </button>
-<div id="collapseSolution1" class="accordion-collapse collapse" aria-labelledby="headingSolution1" data-bs-parent="#accordionSolution1">
+<div id="collapseSolution1" class="accordion-collapse collapse" data-bs-parent="#accordionSolution1" aria-labelledby="headingSolution1">
 <div class="accordion-body">
 <p>Bias field is modeled as multiplicative factor, whereas noise is
 typically assumed as additive and spatially independent (Gaussian)
@@ -554,7 +554,7 @@ <h3 class="callout-title">Brain extraction quiz</h3>
 <button class="accordion-button solution-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSolution2" aria-expanded="false" aria-controls="collapseSolution2">
   <h4 class="accordion-header" id="headingSolution2"> Show me the solution </h4>
 </button>
-<div id="collapseSolution2" class="accordion-collapse collapse" aria-labelledby="headingSolution2" data-bs-parent="#accordionSolution2">
+<div id="collapseSolution2" class="accordion-collapse collapse" data-bs-parent="#accordionSolution2" aria-labelledby="headingSolution2">
 <div class="accordion-body">
 <p>Brain mask at this stage only offers a crude estimate about total
 brain volume. It can be used for quality control (e.g. detecting
@@ -699,7 +699,7 @@ <h3 class="callout-title">Key Points</h3>
   "identifier": "https://carpentries-incubator.github.io/SDC-BIDS-sMRI/instructor/02-Image_Cleanup.html",
   "dateCreated": "2024-10-22",
   "dateModified": "2024-02-19",
-  "datePublished": "2024-12-24"
+  "datePublished": "2024-12-31"
 }
 
   </script><script>
diff --git a/instructor/03-Image_Spatial_Normalization.html b/instructor/03-Image_Spatial_Normalization.html
index 09286a5..2dc3c05 100644
--- a/instructor/03-Image_Spatial_Normalization.html
+++ b/instructor/03-Image_Spatial_Normalization.html
@@ -770,7 +770,7 @@ <h3 class="callout-title">Key Points</h3>
   "identifier": "https://carpentries-incubator.github.io/SDC-BIDS-sMRI/instructor/03-Image_Spatial_Normalization.html",
   "dateCreated": "2024-10-22",
   "dateModified": "2024-02-19",
-  "datePublished": "2024-12-24"
+  "datePublished": "2024-12-31"
 }
 
   </script><script>
diff --git a/instructor/04-Image_Quantification.html b/instructor/04-Image_Quantification.html
index 36023e2..b35452b 100644
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index 46d9e98..3f723ec 100644
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 <div class="accordion-body">
 <p>Use the Freesurfer LUT to identify the correct ROI index. For the
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@@ -841,7 +841,7 @@ <h4 class="accordion-header" id="headingSolution2">
   Hint
   </h4>
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-<div id="collapseSolution2" class="accordion-collapse collapse" data-bs-parent="#accordionSolution2" aria-labelledby="headingSolution2">
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 <div class="accordion-body">
 <p>You’ll need to use your <code>pandas</code>-fu for this exercise.
 Check for NA (aka missing) values in your <code>pandas</code> dataframe.
@@ -870,7 +870,7 @@ <h4 class="accordion-header" id="headingSolution3">
   Hint
   </h4>
 </button>
-<div id="collapseSolution3" class="accordion-collapse collapse" data-bs-parent="#accordionSolution3" aria-labelledby="headingSolution3">
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 <div class="accordion-body">
 <p>Data imputation can be applied to appropriate columns, with the
 <code>fillna()</code> method. You may be interested in the
@@ -1168,7 +1168,7 @@ <h4 class="accordion-header" id="headingSolution4">
   Hint
   </h4>
 </button>
-<div id="collapseSolution4" class="accordion-collapse collapse" data-bs-parent="#accordionSolution4" aria-labelledby="headingSolution4">
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 <div class="accordion-body">
 <p>You can have a look at the outputs generated by
 <code>smriprep/fmriprep</code>.</p>
@@ -1603,7 +1603,7 @@ <h3 class="callout-title">Key Points</h3>
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index ff7fd60..3c0faab 100644
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index 71d0a57..ace6cd8 100644
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index b06eb6f..f6fb9fd 100644
--- a/instructor/LICENSE.html
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index b91b6f4..e17aa94 100644
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 <div class="accordion-body">
 <p>Repetition time (TR) and echo time (TE) are the two pulse sequence
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@@ -578,7 +578,7 @@ <h3 class="callout-title">Tissue type and image contrast</h3>
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 <p>White Matter (i.e. axonal tracts)</p>
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@@ -854,7 +854,7 @@ <h3 class="callout-title">Bias field correction quiz</h3>
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 <p>Bias field is modeled as multiplicative factor, whereas noise is
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-<div id="collapseSolution2" class="accordion-collapse collapse" aria-labelledby="headingSolution2" data-bs-parent="#accordionSolution2">
+<div id="collapseSolution2" class="accordion-collapse collapse" data-bs-parent="#accordionSolution2" aria-labelledby="headingSolution2">
 <div class="accordion-body">
 <p>Brain mask at this stage only offers a crude estimate about total
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-<div id="collapseSolution1" class="accordion-collapse collapse" data-bs-parent="#accordionSolution1" aria-labelledby="headingSolution1">
+<div id="collapseSolution1" class="accordion-collapse collapse" aria-labelledby="headingSolution1" data-bs-parent="#accordionSolution1">
 <div class="accordion-body">
 <p>Use the Freesurfer LUT to identify the correct ROI index. For the
 lateral ventricle, make sure you use the appropriate tissue type to
@@ -2939,7 +2939,7 @@ <h4 class="accordion-header" id="headingSolution2">
   Hint
   </h4>
 </button>
-<div id="collapseSolution2" class="accordion-collapse collapse" data-bs-parent="#accordionSolution2" aria-labelledby="headingSolution2">
+<div id="collapseSolution2" class="accordion-collapse collapse" aria-labelledby="headingSolution2" data-bs-parent="#accordionSolution2">
 <div class="accordion-body">
 <p>You’ll need to use your <code>pandas</code>-fu for this exercise.
 Check for NA (aka missing) values in your <code>pandas</code> dataframe.
@@ -2968,7 +2968,7 @@ <h4 class="accordion-header" id="headingSolution3">
   Hint
   </h4>
 </button>
-<div id="collapseSolution3" class="accordion-collapse collapse" data-bs-parent="#accordionSolution3" aria-labelledby="headingSolution3">
+<div id="collapseSolution3" class="accordion-collapse collapse" aria-labelledby="headingSolution3" data-bs-parent="#accordionSolution3">
 <div class="accordion-body">
 <p>Data imputation can be applied to appropriate columns, with the
 <code>fillna()</code> method. You may be interested in the
@@ -3272,7 +3272,7 @@ <h4 class="accordion-header" id="headingSolution4">
   Hint
   </h4>
 </button>
-<div id="collapseSolution4" class="accordion-collapse collapse" data-bs-parent="#accordionSolution4" aria-labelledby="headingSolution4">
+<div id="collapseSolution4" class="accordion-collapse collapse" aria-labelledby="headingSolution4" data-bs-parent="#accordionSolution4">
 <div class="accordion-body">
 <p>You can have a look at the outputs generated by
 <code>smriprep/fmriprep</code>.</p>
@@ -3832,8 +3832,8 @@ <h3 class="callout-title">Key Points</h3>
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-  "dateModified": "2024-12-24",
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   </script><script>
diff --git a/instructor/images.html b/instructor/images.html
index 274b742..4265ca9 100644
--- a/instructor/images.html
+++ b/instructor/images.html
@@ -702,8 +702,8 @@ <h3 id="07-Reproducibility-figure-4">Figure 4</h3>
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   "identifier": "https://carpentries-incubator.github.io/SDC-BIDS-sMRI/instructor/images.html",
   "dateCreated": "2024-10-22",
-  "dateModified": "2024-12-24",
-  "datePublished": "2024-12-24"
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 }
 
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diff --git a/instructor/index.html b/instructor/index.html
index 3d0c186..dbae4b5 100644
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index 53536c7..c4792e4 100644
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   "dateCreated": "2024-10-22",
-  "dateModified": "2024-12-24",
-  "datePublished": "2024-12-24"
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 }
 
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index bbf2c82..24eda7b 100644
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-  "dateModified": "2024-12-24",
-  "datePublished": "2024-12-24"
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index 55cb9ca..1e47578 100644
--- a/instructor/profiles.html
+++ b/instructor/profiles.html
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   "url": "https://carpentries-incubator.github.io/SDC-BIDS-sMRI/instructor/profiles.html",
   "identifier": "https://carpentries-incubator.github.io/SDC-BIDS-sMRI/instructor/profiles.html",
   "dateCreated": "2024-10-22",
-  "dateModified": "2024-12-24",
-  "datePublished": "2024-12-24"
+  "dateModified": "2024-12-31",
+  "datePublished": "2024-12-31"
 }
 
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diff --git a/instructor/reference.html b/instructor/reference.html
index 9a61cb1..74f9d4b 100644
--- a/instructor/reference.html
+++ b/instructor/reference.html
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   "dateCreated": "2024-10-22",
   "dateModified": "2024-02-19",
-  "datePublished": "2024-12-24"
+  "datePublished": "2024-12-31"
 }
 
   </script><script>
diff --git a/key-points.html b/key-points.html
index b32ca6f..a585c44 100644
--- a/key-points.html
+++ b/key-points.html
@@ -472,8 +472,8 @@ <h2 class="accordion-header" id="flush-headingTwelve">
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   "dateCreated": "2024-10-22",
-  "dateModified": "2024-12-24",
-  "datePublished": "2024-12-24"
+  "dateModified": "2024-12-31",
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diff --git a/pkgdown.yml b/pkgdown.yml
index c215743..18c0d7e 100644
--- a/pkgdown.yml
+++ b/pkgdown.yml
@@ -2,4 +2,4 @@ pandoc: 3.1.11
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diff --git a/profiles.html b/profiles.html
index 6d49933..7a26f7d 100644
--- a/profiles.html
+++ b/profiles.html
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   "dateCreated": "2024-10-22",
-  "dateModified": "2024-12-24",
-  "datePublished": "2024-12-24"
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diff --git a/reference.html b/reference.html
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   "dateModified": "2024-02-19",
-  "datePublished": "2024-12-24"
+  "datePublished": "2024-12-31"
 }
 
   </script><script>