This lesson does work with alpha.6. You must follow the links in the description they will give you updated code.

Hello Dominic Davies

The current version of Bootstrap 4 (alpha 6) doesn't work the same as in the video. Here are the changes you'll need to make to get this to work:

• Bootstrap no longer uses class names like this m-t-3 to define the location, size and type of spacing (padding or margin). They've decided to remove the first hyphen character, so the correct class name would be mt-3.
• The spacing values discussed in the video no longer reflect full REM values. In other words, mt-3 does not add 3 rem to the top margin. It actually is just 1 rem. To get the spacing above the headline as seen in the video the top margin should be mt-5.
• Adding a margin to the bottom of the headline no longer works -- due to a "collapsing margin" (Mastering Collapsing Margins) adding margin space to the bottom of the paragraph doesn't add any space. Instead use a class to add bottom padding to the paragraph: pb-3

The correct code for the headline and paragraph should be:

<h1 class="display-1 mt-5">Full Stack Conf</h1>
<p class="lead pb-3">Coming Soon, a One-day Conference About All Things JavaScript!</p>

I've updated the teacher's notes to describe these changes: https://teamtreehouse.com/library/enhancing-the-page and we'll be re-doing the affected videos once a stable beta version of Bootstrap 4 is released.

Very happy with the updates

Thanks for your work Dave, I'm getting through the material quickly. I couldn't believe the changes between the alpha versions!