Husband says I'm being too hard on our daughter...

Okay, so our daughter will be 6 in September and will start kindergarten in August. She was in the preschool program at the local elementary school this past year and I purchased her a summer bridge activity book. Every morning I do flash cards with her and have her trace her letters and we read a book. In the evening I give her 6 pages of from her work book, front and back. He says this is too much. She hasn't complained. Thoughts?