K.OA.A.1 Kindergarten · Operations and Algebraic ThinkingRepresent addition and subtraction with objects, fingers, mental images, drawings, sounds (e.g., claps), acting out situations, verbal explanations, expressions, or equations.Common Core State Standards for Mathematics, as adopted in the Massachusetts Curriculum Framework for Mathematics (2017), Kindergarten.
Play the game: One More, One LessStep 1 of the ColorMyMath curriculum · free, no sign-up →Addition is a length — dots laid end to end on the number line. Taking away comes down the same line. Every fact is shown as a picture before it is ever asked for from memory.
Every page is free and open — nothing to install, no account, and it works on a phone or a classroom board. Every number has its own color: 1 red, 2 orange, 3 yellow, 4 green, 5 blue, 6 purple, 7 brown, 8 pink, 9 cyan, and a number is that many colored dots.
Step 1Adding 1 up to 5: counting to 5Step 2Subtracting 1 from 5 to 0: counting back from 5Step 6Subtracting 1: counting back from 10K.OA.A.2Add and take away word problems within 10K.OA.A.3Break numbers up to 10 into pairs in more than one way (5 = 2 + 3 = 4 + 1)K.OA.A.4For any number 1 to 9, find the number that makes 10K.OA.A.5Add and subtract within 5 fluentlyColorMyMath · getridoftheteacher.com · every number has its own color, and a number is that many colored dots. Matching a game to a standard is a judgement call; the official text is at doe.mass.edu.