This subject is one of Fischer’s favorites & strongest subject. We chose Math-U-See brand because they use strategies to help commit math facts to memory & is slow in progression. It came highly recommended. Other suggestions were Singapore Math and Saxon. Our last math book was Masterbooks, and it felt more supplemental, fast, and didn’t go back to review often. Fischer tested for Alpha level on MUS, which focuses on building a strong foundation for the concepts of single-digit addition and subtraction. It certainly was on the pricier side, the most expensive curriculum ($180), as it came with the base learning tools and a teacher’s guide. It will be about $100 cheaper when he moves up a level, and even cheaper if we use this for future kiddos and just buy a new workbook. He’s been working on it through the summer already, it’s certainly an upgrade from Masterbooks.