diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 77f6cdc359..f9cca5b785 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -11,7 +11,7 @@ jobs:
           ruby-version: 2.5.8
           bundler-cache: true
       - name: Set up coursier
-        uses: laughedelic/coursier-setup@v1
+        uses: coursier/setup-action@v1.2.0-M2
         with:
           jvm: adopt:11
       - name: Run mdoc
diff --git a/_includes/carousel.html b/_includes/carousel.html
new file mode 100644
index 0000000000..0a9d6c00ff
--- /dev/null
+++ b/_includes/carousel.html
@@ -0,0 +1,219 @@
+{% assign letterstring = "a,b,c,d,e,f,g,h,i,j,k,l,m,n" %}
+{% assign letters = letterstring | split: ',' %}
+{% assign number = include.number | minus: 1 %}
+<div class="carousel__holder">
+  <div id="carousel{{ number }}" class="carousel">
+    {% for item in include.images %}
+    <input class="carousel__activator" type="radio" name="carousel{{ number }}" id="{{ number }}{{ letters[forloop.index0] }}" {% if forloop.first %}checked="checked"{% endif %} />
+    {% endfor %}
+    {% for item in include.images %}
+    {% if forloop.index == forloop.length %}
+    {% assign nextindex = 0 %}
+    {% else %}
+    {% assign nextindex = forloop.index0 | plus: 1 %}
+    {% endif %}
+    {% assign nextletter = letters[nextindex] %}
+    {% if forloop.index0 == 0 %}
+    {% assign previndex = forloop.length | minus: 1 %}
+    {% else %}
+    {% assign previndex = forloop.index0 | minus: 1 %}
+    {% endif %}
+    {% assign prevletter = letters[previndex] %}
+    <div class="carousel__controls">
+      <label class="carousel__control carousel__control--backward" for="{{ number }}{{ prevletter }}"></label>
+      <label class="carousel__control carousel__control--forward" for="{{ number }}{{ nextletter }}"></label>
+    </div>
+    {% endfor %}
+    <div class="carousel__track">
+      <ul>
+        {% for item in include.images %}
+        <li class="carousel__slide" style="background-image: url('{{ item }}');"></li>
+        {% endfor %}
+      </ul>
+    </div>
+    <div class="carousel__indicators">
+      {% for item in include.images %}
+      <label class="carousel__indicator" for="{{ number }}{{ letters[forloop.index0] }}"></label>
+      {% endfor %}
+    </div>
+  </div>
+</div>
+
+<style>
+  .carousel__holder {width: 100%; position: relative; padding-bottom: {{ include.height }}{{ include.unit }}; margin: 1rem 0 1rem;}
+  .carousel {
+    height: 100%;
+    width: 100%;
+    overflow: hidden;
+    text-align: center;
+    position: absolute;
+    padding: 0;
+  }
+  .carousel__controls,
+  .carousel__activator {
+    display: none;
+  }
+  {% for item in include.images %}
+  .carousel__activator:nth-of-type({{ forloop.index }}):checked ~ .carousel__track {
+  -webkit-transform: translateX(-{{ forloop.index0 }}00%);
+  transform: translateX(-{{ forloop.index0 }}00%);
+  }
+  .carousel__activator:nth-of-type({{ forloop.index }}):checked ~ .carousel__slide:nth-of-type({{ forloop.index }}) {
+    transition: opacity 0.5s, -webkit-transform 0.5s;
+    transition: opacity 0.5s, transform 0.5s;
+    transition: opacity 0.5s, transform 0.5s, -webkit-transform 0.5s;
+    top: 0;
+    left: 0;
+    right: 0;
+    opacity: 1;
+    -webkit-transform: scale(1);
+    transform: scale(1);
+  }
+  .carousel__activator:nth-of-type({{ forloop.index }}):checked ~ .carousel__controls:nth-of-type({{ forloop.index }}) {
+    display: block;
+    opacity: 1;
+  }
+  .carousel__activator:nth-of-type({{ forloop.index }}):checked ~ .carousel__indicators .carousel__indicator:nth-of-type({{ forloop.index }}) {
+    opacity: 1;
+  }
+  {% endfor %}
+
+  .carousel__control {
+    height: 30px;
+    width: 30px;
+    margin-top: -15px;
+    top: 50%;
+    position: absolute;
+    display: block;
+    cursor: pointer;
+    border-width: 5px 5px 0 0;
+    border-style: solid;
+    border-color: #fafafa;
+    opacity: 0.35;
+    opacity: 1;
+    outline: 0;
+    z-index: 3;
+  }
+  .carousel__control:hover {
+    opacity: 1;
+  }
+  .carousel__control--backward {
+    left: 20px;
+    -webkit-transform: rotate(-135deg);
+    transform: rotate(-135deg);
+  }
+  .carousel__control--forward {
+    right: 20px;
+    -webkit-transform: rotate(45deg);
+    transform: rotate(45deg);
+  }
+  .carousel__indicators {
+    position: absolute;
+    bottom: 20px;
+    width: 100%;
+    text-align: center;
+  }
+  .carousel__indicator {
+    height: 15px;
+    width: 15px;
+    border-radius: 100%;
+    display: inline-block;
+    z-index: 2;
+    cursor: pointer;
+    opacity: 0.35;
+    margin: 0 2.5px 0 2.5px;
+  }
+  .carousel__indicator:hover {
+    opacity: 0.75;
+  }
+  .carousel__track {
+    position: absolute;
+    top: 0;
+    right: 0;
+    bottom: 0;
+    left: 0;
+    padding: 0;
+    margin: 0;
+    transition: -webkit-transform 0.5s ease 0s;
+    transition: transform 0.5s ease 0s;
+    transition: transform 0.5s ease 0s, -webkit-transform 0.5s ease 0s;
+  }
+  .carousel__track .carousel__slide {
+    display: block;
+    top: 0;
+    left: 0;
+    right: 0;
+    opacity: 1;
+  }
+  {% for item in include.images %}
+  .carousel__track .carousel__slide:nth-of-type({{ forloop.index }}) {
+  -webkit-transform: translateX({{ forloop.index0 }}00%);
+  transform: translateX({{ forloop.index0 }}00%);
+  }
+  {% endfor %}
+
+  .carousel--scale .carousel__slide {
+    -webkit-transform: scale(0);
+    transform: scale(0);
+  }
+  .carousel__slide {
+    height: 100%;
+    position: absolute;
+    opacity: 0;
+    overflow: hidden;
+  }
+  .carousel__slide .overlay {height: 100%;}
+  .carousel--thumb .carousel__indicator {
+    height: 30px;
+    width: 30px;
+  }
+  .carousel__indicator {
+    background-color: #fafafa;
+  }
+  {% for item in include.images %}
+  .carousel__slide:nth-of-type({{ forloop.index }}),
+  .carousel--thumb .carousel__indicators .carousel__indicator:nth-of-type({{ forloop.index }}) {
+    background-size: cover;
+    background-position: center;
+  }
+  {% endfor %}
+</style>
+
+<script>
+  function isVisible(el) {
+        while (el) {
+            if (el === document) {
+                return true;
+            }
+
+            var $style = window.getComputedStyle(el, null);
+
+            if (!el) {
+                return false;
+            } else if (!$style) {
+                return false;
+            } else if ($style.display === 'none') {
+                return false;
+            } else if ($style.visibility === 'hidden') {
+                return false;
+            } else if (+$style.opacity === 0) {
+                return false;
+            } else if (($style.display === 'block' || $style.display === 'inline-block') &&
+                $style.height === '0px' && $style.overflow === 'hidden') {
+                return false;
+            } else {
+                return $style.position === 'fixed' || isVisible(el.parentNode);
+            }
+        }
+  }
+  {% if include.duration %}
+  setInterval(function(){
+    var j=0;
+    var elements = document.querySelectorAll('#carousel{{ number}} .carousel__control--forward');
+    for(i=(elements.length - 1);i>-1;i--) {
+      if(isVisible(elements[i])) j=i;
+    }
+    elements[j].click();
+  },{{ include.duration }}000);
+  {% endif %}
+</script>
diff --git a/online-courses.md b/online-courses.md
index eab17d735a..c129233e65 100644
--- a/online-courses.md
+++ b/online-courses.md
@@ -2,6 +2,22 @@
 title: Online Courses from The Scala Center
 layout: singlepage-overview
 scala3: true
+testimonials:
+  - /resources/images/online-courses/testimonial000.jpg
+  - /resources/images/online-courses/testimonial001.jpg
+  - /resources/images/online-courses/testimonial002.jpg
+  - /resources/images/online-courses/testimonial003.jpg
+  - /resources/images/online-courses/testimonial004.jpg
+  - /resources/images/online-courses/testimonial005.jpg
+  - /resources/images/online-courses/testimonial006.jpg
+  - /resources/images/online-courses/testimonial007.jpg
+  - /resources/images/online-courses/testimonial008.jpg
+  - /resources/images/online-courses/testimonial009.jpg
+  - /resources/images/online-courses/testimonial010.jpg
+  - /resources/images/online-courses/testimonial011.jpg
+  - /resources/images/online-courses/testimonial012.jpg
+  - /resources/images/online-courses/testimonial013.jpg
+  - /resources/images/online-courses/testimonial014.jpg
 ---
 
 The online courses from the [Scala Center] provide two main paths to learn 
@@ -89,6 +105,10 @@ the (legacy) Scala 2 version of our courses here:
 - [Parallel Programming (Scala 2 version)](https://www.coursera.org/learn/scala2-parallel-programming)
 - [Programming Reactive Systems (Scala 2 version)](https://www.coursera.org/learn/scala2-akka-reactive)
 
+## Testimonials
+
+{% include carousel.html images=page.testimonials number=0 height="50" unit="%" duration="10" %}
+
 ## Other Online Resources
 
 You can find other online resources contributed by the community on
diff --git a/resources/images/online-courses/testimonial000.jpg b/resources/images/online-courses/testimonial000.jpg
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diff --git a/resources/images/online-courses/testimonial002.jpg b/resources/images/online-courses/testimonial002.jpg
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