It lets you peek when you're learning German, as far as I know. But I"m here only to learn German, not any other language. I agree, you should make some flash cards, and study them. I've got a small composition book where I write down words I'm having difficulty with, or notes for the language. Try that as well. It really helps.

I've just tried Lesson 1 of Possession in French, peeking works fine for me.

Try another skill, does the peeking work there? If yes, something is wrong for Possessions for your accound. If no, perhaps something is wrong with your browser or connection.

Were you trying to test out of any skills? I know it won't let you peek there. never had any peeking problems here.

Maybe try using another browser? See if it works better there.

I don't know what happened but it started working again :P