This is a great blog with many ideas involving math concepts and activities. I personally like the interactive line plot and used this idea in my practicum class. The students were very involved and enjoyed the activity. They were so excited to find out which number spot would "win".
Do you agree? Osmo is committed to this principle. Osmo works with iPad and lets kids learn while playing outside of the screen - using physical manipulatives. Games are designed for the classroom and are customizable as well.