They have 10 words a week. I think that abstruse is not a word for most elementary age kids. I'm wondering what the teacher is thinking on that. Another is "abut", which my silly 7 year old thinks is hilarious. That one is right up his alley. He also had "affidavit", he doesn't have the background knowledge to really understand that one. My 7th grader learned some new words, so that is a plus.