Robbie watched the HOP Unit 4 videos today (he doesn't always watch the videos, but I think they help). He also completed all of Lesson 10 including the Unit 4 Review. He read the book "The Kit".
Just two more units until we need to buy the Kindergarten, Level 2. He's not really encountered anything new (except some of the "helper words", a.k.a. "sight words", which I am teaching him the rules for as we go) but his confidence and fluency are soaring.