diff --git a/03-working-with-data.html b/03-working-with-data.html
index c46e338f..f022e100 100644
--- a/03-working-with-data.html
+++ b/03-working-with-data.html
@@ -528,7 +528,7 @@ <h3 class="callout-title">Splitting Subjects into separate cells<a class="anchor
 <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" 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">
 <ol style="list-style-type: decimal"><li>The subject words/headings are divided up with the pipe ( | )
 character</li>
@@ -557,7 +557,7 @@ <h3 class="callout-title">Joining the Subjects column back together<a class="anc
 <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" 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">
 <ol style="list-style-type: decimal"><li>The subject words/headings were previously delimited with the pipe (
 | ) character</li>
diff --git a/04-faceting-and-filtering.html b/04-faceting-and-filtering.html
index aee01866..bb59cb35 100644
--- a/04-faceting-and-filtering.html
+++ b/04-faceting-and-filtering.html
@@ -440,7 +440,7 @@ <h3 class="callout-title">Which licences are used for articles in this
 <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">
 <ol style="list-style-type: decimal"><li>Create a facet for the ‘Licence’ column</li>
 <li>Sort values by <code>count</code>
@@ -532,7 +532,7 @@ <h3 class="callout-title">Find all publications without a DOI<a class="anchor" a
 <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">
 <ol style="list-style-type: decimal"><li>On the <code>DOI</code> column drop down and select
 <code>Facets &gt; Customized facets &gt; Facet by blank</code>
@@ -575,7 +575,7 @@ <h3 class="callout-title">Correct the Language values via a facet<a class="ancho
 <button class="accordion-button solution-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSolution3" aria-expanded="false" aria-controls="collapseSolution3">
   <h4 class="accordion-header" id="headingSolution3">Show me the solution</h4>
 </button>
-<div id="collapseSolution3" class="accordion-collapse collapse" aria-labelledby="headingSolution3" data-bs-parent="#accordionSolution3">
+<div id="collapseSolution3" class="accordion-collapse collapse" data-bs-parent="#accordionSolution3" aria-labelledby="headingSolution3">
 <div class="accordion-body">
 <ol style="list-style-type: decimal"><li>Create a Text facet on the Language column</li>
 <li>Notice that there is both <code>EN</code> and
diff --git a/11-using-arrays-transformations.html b/11-using-arrays-transformations.html
index 9e19367c..5892c41c 100644
--- a/11-using-arrays-transformations.html
+++ b/11-using-arrays-transformations.html
@@ -370,8 +370,8 @@ <h3 class="card-title">Objectives</h3>
 array in a transformation.</p>
 
 <p>It does this using a function called uniques() which can be used to
-remove duplicates from an array. In this example we start with a list of
-subject words:</p>
+remove duplicates from an array. In this example’s Subject column, we
+start with a list of subject words:</p>
 <p><code>crystal structure|clozapinium|crystal structure|molecular configuration|hydrogen bonding|supramolecular assembly|Chemistry|QD1-999</code></p>
 <p>Examining this by eye we can see it contains “crystal structure”
 twice. If we assume that each cell in the subject column might have
diff --git a/aio.html b/aio.html
index 586543bb..88365cc9 100644
--- a/aio.html
+++ b/aio.html
@@ -1058,7 +1058,7 @@ <h3 class="callout-title">Splitting Subjects into separate cells<a class="anchor
 <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" 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">
 <ol style="list-style-type: decimal">
 <li>The subject words/headings are divided up with the pipe ( | )
@@ -1093,7 +1093,7 @@ <h3 class="callout-title">Joining the Subjects column back together<a class="anc
 <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" 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">
 <ol style="list-style-type: decimal">
 <li>The subject words/headings were previously delimited with the pipe (
@@ -1248,7 +1248,7 @@ <h3 class="callout-title">Which licences are used for articles in this
 <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">
 <ol style="list-style-type: decimal">
 <li>Create a facet for the ‘Licence’ column</li>
@@ -1351,7 +1351,7 @@ <h3 class="callout-title">Find all publications without a DOI<a class="anchor" a
 <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">
 <ol style="list-style-type: decimal">
 <li>On the <code>DOI</code> column drop down and select
@@ -1401,7 +1401,7 @@ <h3 class="callout-title">Correct the Language values via a facet<a class="ancho
 <button class="accordion-button solution-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSolution3" aria-expanded="false" aria-controls="collapseSolution3">
   <h4 class="accordion-header" id="headingSolution3">Show me the solution</h4>
 </button>
-<div id="collapseSolution3" class="accordion-collapse collapse" aria-labelledby="headingSolution3" data-bs-parent="#accordionSolution3">
+<div id="collapseSolution3" class="accordion-collapse collapse" data-bs-parent="#accordionSolution3" aria-labelledby="headingSolution3">
 <div class="accordion-body">
 <ol style="list-style-type: decimal">
 <li>Create a Text facet on the Language column</li>
@@ -2288,8 +2288,8 @@ <h3 class="card-title">Objectives</h3>
 array in a transformation.</p>
 
 <p>It does this using a function called uniques() which can be used to
-remove duplicates from an array. In this example we start with a list of
-subject words:</p>
+remove duplicates from an array. In this example’s Subject column, we
+start with a list of subject words:</p>
 <p><code>crystal structure|clozapinium|crystal structure|molecular configuration|hydrogen bonding|supramolecular assembly|Chemistry|QD1-999</code></p>
 <p>Examining this by eye we can see it contains “crystal structure”
 twice. If we assume that each cell in the subject column might have
diff --git a/instructor/03-working-with-data.html b/instructor/03-working-with-data.html
index 9b072a80..c28c96c9 100644
--- a/instructor/03-working-with-data.html
+++ b/instructor/03-working-with-data.html
@@ -530,7 +530,7 @@ <h3 class="callout-title">Splitting Subjects into separate cells<a class="anchor
 <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" 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">
 <ol style="list-style-type: decimal"><li>The subject words/headings are divided up with the pipe ( | )
 character</li>
@@ -559,7 +559,7 @@ <h3 class="callout-title">Joining the Subjects column back together<a class="anc
 <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" 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">
 <ol style="list-style-type: decimal"><li>The subject words/headings were previously delimited with the pipe (
 | ) character</li>
diff --git a/instructor/04-faceting-and-filtering.html b/instructor/04-faceting-and-filtering.html
index 32bbff29..280fc8e7 100644
--- a/instructor/04-faceting-and-filtering.html
+++ b/instructor/04-faceting-and-filtering.html
@@ -442,7 +442,7 @@ <h3 class="callout-title">Which licences are used for articles in this
 <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">
 <ol style="list-style-type: decimal"><li>Create a facet for the ‘Licence’ column</li>
 <li>Sort values by <code>count</code>
@@ -534,7 +534,7 @@ <h3 class="callout-title">Find all publications without a DOI<a class="anchor" a
 <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">
 <ol style="list-style-type: decimal"><li>On the <code>DOI</code> column drop down and select
 <code>Facets &gt; Customized facets &gt; Facet by blank</code>
@@ -577,7 +577,7 @@ <h3 class="callout-title">Correct the Language values via a facet<a class="ancho
 <button class="accordion-button solution-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSolution3" aria-expanded="false" aria-controls="collapseSolution3">
   <h4 class="accordion-header" id="headingSolution3">Show me the solution</h4>
 </button>
-<div id="collapseSolution3" class="accordion-collapse collapse" aria-labelledby="headingSolution3" data-bs-parent="#accordionSolution3">
+<div id="collapseSolution3" class="accordion-collapse collapse" data-bs-parent="#accordionSolution3" aria-labelledby="headingSolution3">
 <div class="accordion-body">
 <ol style="list-style-type: decimal"><li>Create a Text facet on the Language column</li>
 <li>Notice that there is both <code>EN</code> and
diff --git a/instructor/06-working-with-columns.html b/instructor/06-working-with-columns.html
index b0e6765a..1f2c964f 100644
--- a/instructor/06-working-with-columns.html
+++ b/instructor/06-working-with-columns.html
@@ -402,7 +402,7 @@ <h3 class="card-title">Objectives</h3>
   <h3 class="accordion-header" id="headingInstructor1">
 <div class="note-square"><i aria-hidden="true" class="callout-icon" data-feather="edit-2"></i></div>Sorting and Reorder Rows Permanently</h3>
 </button>
-<div id="collapseInstructor1" class="accordion-collapse collapse" aria-labelledby="headingInstructor1" data-bs-parent="#accordionInstructor1">
+<div id="collapseInstructor1" class="accordion-collapse collapse" data-bs-parent="#accordionInstructor1" aria-labelledby="headingInstructor1">
 <div class="accordion-body">
 <p>Do not rush these last two sentences. Repeat them slowly after a
 pause and allow learners to explore how sorting works for a moment.</p>
diff --git a/instructor/11-using-arrays-transformations.html b/instructor/11-using-arrays-transformations.html
index adc0e117..3772ba6b 100644
--- a/instructor/11-using-arrays-transformations.html
+++ b/instructor/11-using-arrays-transformations.html
@@ -376,7 +376,7 @@ <h3 class="card-title">Objectives</h3>
   <h3 class="accordion-header" id="headingInstructor1">
 <div class="note-square"><i aria-hidden="true" class="callout-icon" data-feather="edit-2"></i></div>Different meanings of ‘transformation’</h3>
 </button>
-<div id="collapseInstructor1" class="accordion-collapse collapse" aria-labelledby="headingInstructor1" data-bs-parent="#accordionInstructor1">
+<div id="collapseInstructor1" class="accordion-collapse collapse" data-bs-parent="#accordionInstructor1" aria-labelledby="headingInstructor1">
 <div class="accordion-body">
 <p>Ask the students what transformation means to them currently. Many
 may only know it from Excel to convert columns into rows or vice versa.
@@ -388,8 +388,8 @@ <h3 class="accordion-header" id="headingInstructor1">
 </div>
 </div>
 <p>It does this using a function called uniques() which can be used to
-remove duplicates from an array. In this example we start with a list of
-subject words:</p>
+remove duplicates from an array. In this example’s Subject column, we
+start with a list of subject words:</p>
 <p><code>crystal structure|clozapinium|crystal structure|molecular configuration|hydrogen bonding|supramolecular assembly|Chemistry|QD1-999</code></p>
 <p>Examining this by eye we can see it contains “crystal structure”
 twice. If we assume that each cell in the subject column might have
@@ -480,7 +480,7 @@ <h3 class="accordion-header" id="headingInstructor1">
   <h3 class="accordion-header" id="headingInstructor2">
 <div class="note-square"><i aria-hidden="true" class="callout-icon" data-feather="edit-2"></i></div>Recap on best practice for separators</h3>
 </button>
-<div id="collapseInstructor2" class="accordion-collapse collapse" aria-labelledby="headingInstructor2" data-bs-parent="#accordionInstructor2">
+<div id="collapseInstructor2" class="accordion-collapse collapse" data-bs-parent="#accordionInstructor2" aria-labelledby="headingInstructor2">
 <div class="accordion-body">
 <p>Recall previous discussion of dangers of changing separators and
 ensuring you avoid using a separator character that is already used in
diff --git a/instructor/aio.html b/instructor/aio.html
index cccca834..ceecd08c 100644
--- a/instructor/aio.html
+++ b/instructor/aio.html
@@ -1092,7 +1092,7 @@ <h3 class="callout-title">Splitting Subjects into separate cells<a class="anchor
 <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" 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">
 <ol style="list-style-type: decimal">
 <li>The subject words/headings are divided up with the pipe ( | )
@@ -1127,7 +1127,7 @@ <h3 class="callout-title">Joining the Subjects column back together<a class="anc
 <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" 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">
 <ol style="list-style-type: decimal">
 <li>The subject words/headings were previously delimited with the pipe (
@@ -1283,7 +1283,7 @@ <h3 class="callout-title">Which licences are used for articles in this
 <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">
 <ol style="list-style-type: decimal">
 <li>Create a facet for the ‘Licence’ column</li>
@@ -1386,7 +1386,7 @@ <h3 class="callout-title">Find all publications without a DOI<a class="anchor" a
 <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">
 <ol style="list-style-type: decimal">
 <li>On the <code>DOI</code> column drop down and select
@@ -1436,7 +1436,7 @@ <h3 class="callout-title">Correct the Language values via a facet<a class="ancho
 <button class="accordion-button solution-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSolution3" aria-expanded="false" aria-controls="collapseSolution3">
   <h4 class="accordion-header" id="headingSolution3">Show me the solution</h4>
 </button>
-<div id="collapseSolution3" class="accordion-collapse collapse" aria-labelledby="headingSolution3" data-bs-parent="#accordionSolution3">
+<div id="collapseSolution3" class="accordion-collapse collapse" data-bs-parent="#accordionSolution3" aria-labelledby="headingSolution3">
 <div class="accordion-body">
 <ol style="list-style-type: decimal">
 <li>Create a Text facet on the Language column</li>
@@ -1650,7 +1650,7 @@ <h3 class="card-title">Objectives</h3>
   <h3 class="accordion-header" id="headingInstructor1">
 <div class="note-square"><i aria-hidden="true" class="callout-icon" data-feather="edit-2"></i></div>Sorting and Reorder Rows Permanently</h3>
 </button>
-<div id="collapseInstructor1" class="accordion-collapse collapse" aria-labelledby="headingInstructor1" data-bs-parent="#accordionInstructor1">
+<div id="collapseInstructor1" class="accordion-collapse collapse" data-bs-parent="#accordionInstructor1" aria-labelledby="headingInstructor1">
 <div class="accordion-body">
 <p>Do not rush these last two sentences. Repeat them slowly after a
 pause and allow learners to explore how sorting works for a moment.</p>
@@ -2352,7 +2352,7 @@ <h3 class="card-title">Objectives</h3>
   <h3 class="accordion-header" id="headingInstructor1">
 <div class="note-square"><i aria-hidden="true" class="callout-icon" data-feather="edit-2"></i></div>Different meanings of ‘transformation’</h3>
 </button>
-<div id="collapseInstructor1" class="accordion-collapse collapse" aria-labelledby="headingInstructor1" data-bs-parent="#accordionInstructor1">
+<div id="collapseInstructor1" class="accordion-collapse collapse" data-bs-parent="#accordionInstructor1" aria-labelledby="headingInstructor1">
 <div class="accordion-body">
 <p>Ask the students what transformation means to them currently. Many
 may only know it from Excel to convert columns into rows or vice versa.
@@ -2364,8 +2364,8 @@ <h3 class="accordion-header" id="headingInstructor1">
 </div>
 </div>
 <p>It does this using a function called uniques() which can be used to
-remove duplicates from an array. In this example we start with a list of
-subject words:</p>
+remove duplicates from an array. In this example’s Subject column, we
+start with a list of subject words:</p>
 <p><code>crystal structure|clozapinium|crystal structure|molecular configuration|hydrogen bonding|supramolecular assembly|Chemistry|QD1-999</code></p>
 <p>Examining this by eye we can see it contains “crystal structure”
 twice. If we assume that each cell in the subject column might have
@@ -2461,7 +2461,7 @@ <h3 class="accordion-header" id="headingInstructor1">
   <h3 class="accordion-header" id="headingInstructor2">
 <div class="note-square"><i aria-hidden="true" class="callout-icon" data-feather="edit-2"></i></div>Recap on best practice for separators</h3>
 </button>
-<div id="collapseInstructor2" class="accordion-collapse collapse" aria-labelledby="headingInstructor2" data-bs-parent="#accordionInstructor2">
+<div id="collapseInstructor2" class="accordion-collapse collapse" data-bs-parent="#accordionInstructor2" aria-labelledby="headingInstructor2">
 <div class="accordion-body">
 <p>Recall previous discussion of dangers of changing separators and
 ensuring you avoid using a separator character that is already used in
diff --git a/md5sum.txt b/md5sum.txt
index 735eaeef..c8d0a9c9 100644
--- a/md5sum.txt
+++ b/md5sum.txt
@@ -13,7 +13,7 @@
 "episodes/08-writing-transformations.md" "b69d3a52f8de4655d7c8695d95d5821d" "site/built/08-writing-transformations.md" "2023-05-01"
 "episodes/09-undo-and-redo.md" "9dba6d90cc6d8d9d5381cb537006b63e" "site/built/09-undo-and-redo.md" "2023-05-01"
 "episodes/10-data-transformation.md" "47399b9f87a7c2dfae1d6b67eea71cc7" "site/built/10-data-transformation.md" "2023-05-26"
-"episodes/11-using-arrays-transformations.md" "cf7877ad075ff434bbe86cec1c417265" "site/built/11-using-arrays-transformations.md" "2024-06-12"
+"episodes/11-using-arrays-transformations.md" "1f63618b802da3df5ed0d0900d2471a0" "site/built/11-using-arrays-transformations.md" "2024-06-12"
 "episodes/12-export-transformation.md" "aa6dd576a893a0870baa24611573e50b" "site/built/12-export-transformation.md" "2023-05-01"
 "episodes/13-looking-up-data.md" "78395aeacd84ded698a0645d74ac2d48" "site/built/13-looking-up-data.md" "2024-05-08"
 "instructors/instructor-notes.md" "c2dfd88f1e85cccb9cbe872530c534ac" "site/built/instructor-notes.md" "2023-11-21"
diff --git a/pkgdown.yml b/pkgdown.yml
index 53ea75ed..7c7a3835 100644
--- a/pkgdown.yml
+++ b/pkgdown.yml
@@ -2,5 +2,5 @@ pandoc: 3.1.11
 pkgdown: 2.0.9
 pkgdown_sha: ~
 articles: {}
-last_built: 2024-06-12T14:56Z
+last_built: 2024-06-12T14:58Z