У вашего броузера проблема в совместимости с HTML5
I avoided these for a while, and I'm not sure why because I now understand how helpful they are. You can find them in the back of your chapters, or boxed off and highlighted within the chapter. Your instructors will have some as well or look online, but do them. It helps to train your brain to think like a nurse...not easy for most. It does get easier. :) -Robin