diff --git a/aio.html b/aio.html
index 909db81..e98fdcc 100644
--- a/aio.html
+++ b/aio.html
@@ -438,6 +438,12 @@ <h3 class="code-label">WARNING<i aria-hidden="true" data-feather="chevron-left">
 <pre class="warning" tabindex="0"><code>Warning: replacing previous import 'S4Arrays::makeNindexFromArrayViewport' by
 'DelayedArray::makeNindexFromArrayViewport' when loading 'SummarizedExperiment'</code></pre>
 </div>
+<div class="codewrapper sourceCode" id="cb24">
+<h3 class="code-label">R<i aria-hidden="true" data-feather="chevron-left"></i><i aria-hidden="true" data-feather="chevron-right"></i>
+</h3>
+<pre class="downlit sourceCode r">
+<code class="sourceCode R"><span><span class="kw">library</span><span class="op">(</span><span class="st">"SingleCellExperiment"</span><span class="op">)</span></span></code></pre>
+</div>
 <section id="introduction"><h2 class="section-heading">Introduction<a class="anchor" aria-label="anchor" href="#introduction"></a>
 </h2>
 <hr class="half-width">
@@ -469,7 +475,7 @@ <h3 class="callout-title">Challenge 1: Can you do it?<a class="anchor" aria-labe
 </h3>
 <div class="callout-content">
 <p>What is the output of this command?</p>
-<div class="codewrapper sourceCode" id="cb24">
+<div class="codewrapper sourceCode" id="cb25">
 <h3 class="code-label">R<i aria-hidden="true" data-feather="chevron-left"></i><i aria-hidden="true" data-feather="chevron-right"></i>
 </h3>
 <pre class="downlit sourceCode r">
@@ -524,7 +530,7 @@ <h4 class="accordion-header" id="headingSolution2">Show me the solution</h4>
 </h2>
 <hr class="half-width">
 <p>You can also include figures generated from R Markdown:</p>
-<div class="codewrapper sourceCode" id="cb26">
+<div class="codewrapper sourceCode" id="cb27">
 <h3 class="code-label">R<i aria-hidden="true" data-feather="chevron-left"></i><i aria-hidden="true" data-feather="chevron-right"></i>
 </h3>
 <pre class="downlit sourceCode r">
diff --git a/instructor/aio.html b/instructor/aio.html
index 57563d2..5c42650 100644
--- a/instructor/aio.html
+++ b/instructor/aio.html
@@ -441,6 +441,12 @@ <h3 class="code-label">WARNING<i aria-hidden="true" data-feather="chevron-left">
 <pre class="warning" tabindex="0"><code>Warning: replacing previous import 'S4Arrays::makeNindexFromArrayViewport' by
 'DelayedArray::makeNindexFromArrayViewport' when loading 'SummarizedExperiment'</code></pre>
 </div>
+<div class="codewrapper sourceCode" id="cb24">
+<h3 class="code-label">R<i aria-hidden="true" data-feather="chevron-left"></i><i aria-hidden="true" data-feather="chevron-right"></i>
+</h3>
+<pre class="downlit sourceCode r">
+<code class="sourceCode R"><span><span class="kw">library</span><span class="op">(</span><span class="st">"SingleCellExperiment"</span><span class="op">)</span></span></code></pre>
+</div>
 <section id="introduction"><h2 class="section-heading">Introduction<a class="anchor" aria-label="anchor" href="#introduction"></a>
 </h2>
 <hr class="half-width">
@@ -487,7 +493,7 @@ <h3 class="callout-title">Challenge 1: Can you do it?<a class="anchor" aria-labe
 </h3>
 <div class="callout-content">
 <p>What is the output of this command?</p>
-<div class="codewrapper sourceCode" id="cb24">
+<div class="codewrapper sourceCode" id="cb25">
 <h3 class="code-label">R<i aria-hidden="true" data-feather="chevron-left"></i><i aria-hidden="true" data-feather="chevron-right"></i>
 </h3>
 <pre class="downlit sourceCode r">
@@ -542,7 +548,7 @@ <h4 class="accordion-header" id="headingSolution2">Show me the solution</h4>
 </h2>
 <hr class="half-width">
 <p>You can also include figures generated from R Markdown:</p>
-<div class="codewrapper sourceCode" id="cb26">
+<div class="codewrapper sourceCode" id="cb27">
 <h3 class="code-label">R<i aria-hidden="true" data-feather="chevron-left"></i><i aria-hidden="true" data-feather="chevron-right"></i>
 </h3>
 <pre class="downlit sourceCode r">
diff --git a/instructor/introduction.html b/instructor/introduction.html
index f4cc049..3e8e61e 100644
--- a/instructor/introduction.html
+++ b/instructor/introduction.html
@@ -420,6 +420,12 @@ <h3 class="code-label">WARNING<i aria-hidden="true" data-feather="chevron-left">
 <pre class="warning" tabindex="0"><code>Warning: replacing previous import 'S4Arrays::makeNindexFromArrayViewport' by
 'DelayedArray::makeNindexFromArrayViewport' when loading 'SummarizedExperiment'</code></pre>
 </div>
+<div class="codewrapper sourceCode" id="cb24">
+<h3 class="code-label">R<i aria-hidden="true" data-feather="chevron-left"></i><i aria-hidden="true" data-feather="chevron-right"></i>
+</h3>
+<pre class="downlit sourceCode r">
+<code class="sourceCode R"><span><span class="kw">library</span><span class="op">(</span><span class="st">"SingleCellExperiment"</span><span class="op">)</span></span></code></pre>
+</div>
 <section id="introduction"><h2 class="section-heading">Introduction<a class="anchor" aria-label="anchor" href="#introduction"></a>
 </h2>
 <hr class="half-width"><p>This is a lesson created via The Carpentries Workbench. It is written
@@ -463,7 +469,7 @@ <h3 class="callout-title">Challenge 1: Can you do it?<a class="anchor" aria-labe
 </h3>
 <div class="callout-content">
 <p>What is the output of this command?</p>
-<div class="codewrapper sourceCode" id="cb24">
+<div class="codewrapper sourceCode" id="cb25">
 <h3 class="code-label">R<i aria-hidden="true" data-feather="chevron-left"></i><i aria-hidden="true" data-feather="chevron-right"></i>
 </h3>
 <pre class="downlit sourceCode r">
@@ -517,7 +523,7 @@ <h4 class="accordion-header" id="headingSolution2">Show me the solution</h4>
 </section><section id="figures"><h2 class="section-heading">Figures<a class="anchor" aria-label="anchor" href="#figures"></a>
 </h2>
 <hr class="half-width"><p>You can also include figures generated from R Markdown:</p>
-<div class="codewrapper sourceCode" id="cb26">
+<div class="codewrapper sourceCode" id="cb27">
 <h3 class="code-label">R<i aria-hidden="true" data-feather="chevron-left"></i><i aria-hidden="true" data-feather="chevron-right"></i>
 </h3>
 <pre class="downlit sourceCode r">
diff --git a/introduction.html b/introduction.html
index a73a06f..cd7cf73 100644
--- a/introduction.html
+++ b/introduction.html
@@ -418,6 +418,12 @@ <h3 class="code-label">WARNING<i aria-hidden="true" data-feather="chevron-left">
 <pre class="warning" tabindex="0"><code>Warning: replacing previous import 'S4Arrays::makeNindexFromArrayViewport' by
 'DelayedArray::makeNindexFromArrayViewport' when loading 'SummarizedExperiment'</code></pre>
 </div>
+<div class="codewrapper sourceCode" id="cb24">
+<h3 class="code-label">R<i aria-hidden="true" data-feather="chevron-left"></i><i aria-hidden="true" data-feather="chevron-right"></i>
+</h3>
+<pre class="downlit sourceCode r">
+<code class="sourceCode R"><span><span class="kw">library</span><span class="op">(</span><span class="st">"SingleCellExperiment"</span><span class="op">)</span></span></code></pre>
+</div>
 <section id="introduction"><h2 class="section-heading">Introduction<a class="anchor" aria-label="anchor" href="#introduction"></a>
 </h2>
 <hr class="half-width"><p>This is a lesson created via The Carpentries Workbench. It is written
@@ -446,7 +452,7 @@ <h3 class="callout-title">Challenge 1: Can you do it?<a class="anchor" aria-labe
 </h3>
 <div class="callout-content">
 <p>What is the output of this command?</p>
-<div class="codewrapper sourceCode" id="cb24">
+<div class="codewrapper sourceCode" id="cb25">
 <h3 class="code-label">R<i aria-hidden="true" data-feather="chevron-left"></i><i aria-hidden="true" data-feather="chevron-right"></i>
 </h3>
 <pre class="downlit sourceCode r">
@@ -500,7 +506,7 @@ <h4 class="accordion-header" id="headingSolution2">Show me the solution</h4>
 </section><section id="figures"><h2 class="section-heading">Figures<a class="anchor" aria-label="anchor" href="#figures"></a>
 </h2>
 <hr class="half-width"><p>You can also include figures generated from R Markdown:</p>
-<div class="codewrapper sourceCode" id="cb26">
+<div class="codewrapper sourceCode" id="cb27">
 <h3 class="code-label">R<i aria-hidden="true" data-feather="chevron-left"></i><i aria-hidden="true" data-feather="chevron-right"></i>
 </h3>
 <pre class="downlit sourceCode r">
diff --git a/md5sum.txt b/md5sum.txt
index 5fb48ec..b10e748 100644
--- a/md5sum.txt
+++ b/md5sum.txt
@@ -4,9 +4,9 @@
 "config.yaml" "a656bf64ddf9dea368784ec03fdd4ea9" "site/built/config.yaml" "2024-01-11"
 "index.md" "a02c9c785ed98ddd84fe3d34ddb12fcd" "site/built/index.md" "2024-01-11"
 "links.md" "8184cf4149eafbf03ce8da8ff0778c14" "site/built/links.md" "2024-01-11"
-"episodes/introduction.Rmd" "8ba21dc77879d8098f747f3ef507fcbb" "site/built/introduction.md" "2024-01-11"
+"episodes/introduction.Rmd" "e724f214ae7bddbc69ae2888ce6fbccf" "site/built/introduction.md" "2024-01-11"
 "instructors/instructor-notes.md" "cae72b6712578d74a49fea7513099f8c" "site/built/instructor-notes.md" "2024-01-11"
 "learners/reference.md" "1c7cc4e229304d9806a13f69ca1b8ba4" "site/built/reference.md" "2024-01-11"
 "learners/setup.md" "61568b36c8b96363218c9736f6aee03a" "site/built/setup.md" "2024-01-11"
 "profiles/learner-profiles.md" "60b93493cf1da06dfd63255d73854461" "site/built/learner-profiles.md" "2024-01-11"
-"renv/profiles/lesson-requirements/renv.lock" "c21b41a8c21d516fab5bf0fa3ad39568" "site/built/renv.lock" "2024-01-11"
+"renv/profiles/lesson-requirements/renv.lock" "e46b0f9e789d2e1820520a2158459a78" "site/built/renv.lock" "2024-01-11"
diff --git a/pkgdown.yml b/pkgdown.yml
index 22a6d91..b31cf53 100644
--- a/pkgdown.yml
+++ b/pkgdown.yml
@@ -2,5 +2,5 @@ pandoc: 2.19.2
 pkgdown: 2.0.7
 pkgdown_sha: ~
 articles: {}
-last_built: 2024-01-11T14:22Z
+last_built: 2024-01-11T14:31Z