Getting Started with HTML5
thinkful.com
thinkful.com
http://i.imgur.com/7b7nhFB.png
Using Chrome 31.0.1650.63 on OS X Mavericks
I'm not able to replicate your bug on my end, though I don't have Mavericks. I see in your photo that the code isn't highlighted, making me think that the highlight.js plugin isn't loading. Do you have JavaScript blocked in some way?
Once I get to the 3rd slide it starts to appear on the page. When I go forward or backward on the slides/pages the jumbled content is still stuck on my screen overlaying the content I should be seeing.