The success of this multiplication math workbook stems from focused organization (see below). The answers to all of the exercises can be checked with a key at the back.The facts are introduced one at a time.Mixed practice begins with 0 thru 5 to help develop confidence.The next section pairs 4-9 with 0-5.A separate section is dedicated to 4-9 times 4-9. These are important facts with which most students tend to struggle.At this stage, students are ready for mixed exercises with 0-9.Since 0 and 1 are very easy, the following section mixes 2-9 only.The numbers 10-12 are introduced in stages.The book concludes with sections of 0-12 and 2-12.