You just need to update your Adobe Reader:
If you are on a Mac, do not open with Preview. It will not work. Download the most updated version of Adobe Reader and open the PDF with it (and not Preview). To 'open with' adobe reader on a mac, highlight the product pdf icon with one click, go to 'file' at the top of the screen, choose 'open with' then select 'adobe' and you'll be all set.
I just printed everything out and have it ready for my kids. I love that there are seven activities hitting so many different skills. Some of the activities use buttons. I'm so excited; I've been saving buttons for years and now I can put them to good use in my classroom. Absolutely perfect for my classroom needs. Thanks for a well thought out and useful math pack.