Do you have to do all these programs? It seems like summer is the one time of the year where you really don't have to distort an activity like reading. If you want to read 1 long book over 3 months this it the time to do it. If I had any goal for a first grader I would focus on joy. Long term, almost everyone is literate but not everyone is a reader. Encourage selecting books she wants to read and forget about lexiles for a few months. She'll probably select books that grow vocabulary anyway.