Primary Grade Challenge Math offers material that goes beyond calculation skills for those children who enter the primary grades already knowing basic concepts. This curriculum allows parents and teachers to instill a deeper level of mathematical understanding and thinking skills in young children while nurturing a love of mathematics. (Grades 1st - 4th) Each chapter’s questions are broken down into four levels: Level 1 (easy) Level 2 (somewhat challenging) Level 3 (challenging) Einstein (very challenging) Includes chapters on: Sequences, Problem-solving, Money, Percents, Algebraic Thinking, Negative Numbers, Logic, Ratios, Probability, Measurements, Fractions, Division.