Most of the time, the extra learning has to happen at home. I really don't mind when learning is this much fun and includes bonding with my children.
I've spent two short time frames over the last two weeks working with my 4 yo son. We've been using the Go and Path App. So far, I think they are great for pre-readers. It is visual and enjoyable for a child to explore.
I will document our learning here in my blog as I continue to explore and learn. Here is the first video that shares my son's trouble shooting and first challenge with Dash.