This bundle of combo pack Contains 8 books of the first 4 levels (A and B both). These four levels cover the topics of Addition/subtractions/ multiplications and division along with Mental Maths techniques. Book “A” is for classwork and Book “B” is for homework. Daily “Oral” practice of 10 minutes is mandatory for the students. Dailly practice tracker has been given at the start of book-B. The “Dictation Book” for oral practice is also available here. Abacus is a great and ancient tool to learn mathematics and Fast Calculations. It helps in the whole brain development of a child. All books are very attractive and of very good quality.