[Pentabooks] Mastering Mathematics Work-Textbook Secondary 1-3

based on Thailand's newly revised curriculum of B.E. 2560 (A.D. 2017). This book is adapted and developed from a Singapore's best seller series of Secondary Mathematics approved by Singapore's MOE. It employs the CPA approach and Bar modeling which makes Singapore Math known to the world. Each book finishes with Problems in Real-World Context to let students apply their mathematical knowledge on real-life situations.