The Home Instructor's Guide bridges the gaps between the textbook and workbooks in the Primary Math 5B program, walking you through them in a logical, step-by-step fashion.
The Home Instructor's Guide lays everything out for you: what concepts you will cover in each of the units in the Primary Math program, what pages you will reference in the textbook and workbooks, exercises for your child that will reinforce the concepts s/he learns, answers to all of the math problems, and more.
The guide coordinates everything and assists you in such a way that you will need to invest far less energy to give your children the top-notch math education for which you purchased Singapore Math in the first place.