Any thoughts on the Primary Grade Challenge Math by Edward Zaccaro as a supplement to in-school differentiation (for after schooling or for sending to school)? I wonder how it compares to Beast Academy.
It would be for 2nd grade DD. I'm not sure if we want to jump into Beast Academy 3rd grade (would do pre-assessment, of course). I picked up the Challenge Math for Elementary and Middle School a year or so ago for my DS9 but we never really dug in -- it was pretty involved, and we could have used a lower starting point.
