Goofi Academic Books – Singapore Math 1B is a Math Activity book for kids with the most advanced math curriculum in the world. Singapore Math uses the CPA (The Concrete Pictorial Abstract) method to teach concepts to build a strong foundation in math. 1. The math activity book uses the CPA (The Concrete Pictorial Abstract) method to teach math concepts to build a very strong foundation in math. 2. Singapore Math is the most advanced math curriculum in the world. Students who complete the Singapore Math book and program are 2-3 years ahead of other students. They perform better in real-life math and finance. 3. Singapore Math 2A and 2B books are appropriate for KG – 1, 2, Grade – 1 students, and Grade – 2.