I've nearly forgotten how to do this. Forgive me if this has been hashed recently.

I'm looking for a good vocabulary program for a gifted 7yo. I am just not seeing her pick up new vocabulary words through independent reading, and she has never gotten reading instruction at her level.

She has a spiky profile, so this may just be her average processing speed coming into play, but she can answer comprehension questions for 9th grade reading passages but cannot give me good definitions for pretty easy vocabulary words, i.e. "luxurious" was one the other day. Yet this does not seem to affect her comprehension. So, I thought I would actually take it upon myself to maybe explicitly teach her some vocabulary this summer.

Any ideas?