Note: this workbook and answer key are for grades 6 and up. The MathTacular4 DVD is for grades 4 and up. Get the complete MathTacular4 Package here. Follow along with MathTacular4 and become a master Word Problem solver! Use this workbook to join Detective Justin Time and Amber Waves on their MathTacular4 sleuthing adv Sonlight resource: https://www.sonlight.com/products/mathtacular-4-workbook-answer-key