Last month, TED announced its new education initiative — fittingly named TED-Ed — with a YouTube channel showcasing teachers’ lessons presented as animated videos. Today, the program moved forward, as TED opened up a beta version of a website meant to complement those lessons. Though there are plenty of study aides here, ed.ted.com is really about the grown-ups on the other side of the classroom. The site lets teachers with a TED account “flip” videos from TED-Ed and YouTube — i.e., customize them to include multiple-choice and open-answer questions and links to additional info on a topic. Currently there are 62 videos and 238 “flips” available for viewing, but TED is gearing up for a full launch to be timed with the new school year in September.