Add cfu at end of lesson

Kalikoze · Jul 23, 2019 · 4887989 · 4887989
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commit 4887989
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diff --git a/lessons/module-2/asynchronous-javascript.md b/lessons/module-2/asynchronous-javascript.md
@@ -49,5 +49,9 @@ Let's take a look at snippets of [this video](https://www.youtube.com/watch?v=8a
 
 After this point, the talk is good but gets into a lot of detail.
 
+<section class="checks-for-understanding">
+### Check for Understanding
+
 Let's take this event loop example with `setTimeout` and translate it to what we have seen with `fetch` and promises. Note that the event loop will wait until the call stack is empty to run the `.then` from a fetch call.
+</section>