Review on 📚 Mastering Double Digit Math with Channies Problem Workbook: Boosting Skills for a Strong Foundation by Andy Hearshman

I ordered several addition and subtraction workbooks and this one was the best. It has a great difficulty curve and there is a good mix of challenges on each side. There are also a few spots where it contains something clever designed to raise a child (like the page where all but one of the tasks use the same operator to teach the importance of the operator to check each task). When I started this book with my kids, they barely knew how to add or subtract. In the last few pages, they easily skimmed content with excellent ratings, although the last few pages are the hardest and you expect to be able to add or subtract any two-digit numbers you want. A lot of thought went into this workbook. and I found it a great learning tool.