This Common Core Math Review for Grade One: Operations and Algebraic Thinking will provide all first-grade teachers with a quick, effective assessment of their first-grade students' math skills according to the common core standards. Solving word problems, through addition and subtraction, whose sums and/or differences are within 20, identifying number sentences that are true or false within the sum or difference of 20 through the understanding of the commutative property concept, creating numbe