Part-whole

Students break small collections of objects into two groups and describe each group as a part of the whole collection.

K.OA.A.1: Represent addition and subtraction with objects, fingers, mental images, drawings, sounds (e.g., claps), acting out situ...

Students draw pictures to show a whole group separated into two parts, recording the number in each part and the total.

K.OA.A.1: Represent addition and subtraction with objects, fingers, mental images, drawings, sounds (e.g., claps), acting out situ...

Students are introduced to the part-part-whole mat and use it to organise objects into two parts that combine to make the whole.

K.OA.A.1: Represent addition and subtraction with objects, fingers, mental images, drawings, sounds (e.g., claps), acting out situ...

Students role-play simple story scenarios of putting together and taking apart groups, connecting actions to the language of addition and subtraction.

K.OA.A.1: Represent addition and subtraction with objects, fingers, mental images, drawings, sounds (e.g., claps), acting out situ...

Students find all the ways to break the numbers 2, 3, 4, and 5 into two parts, recording each combination on a part-part-whole diagram.

K.OA.A.3: Compose and decompose quantities within 10.

Students systematically decompose each number to five into two addends, discovering that numbers can be split in more than one way.

K.OA.A.3: Compose and decompose quantities within 10.

Students use counters and ten-frames to find pairs of parts that compose the numbers 6 through 10.

K.OA.A.3: Compose and decompose quantities within 10.

Students record multiple decompositions for numbers 6 to 10, organising results to look for patterns in the pairs of addends.

K.OA.A.3: Compose and decompose quantities within 10.

Students solve simple put-together and add-to story problems using objects, drawings, or equations, finding totals within ten.

K.OA.A.2: Solve addition and subtraction word problems, and add and subtract within 10, e.g., by using objects or drawings to repr...

Students solve take-apart and take-from story problems within ten, using objects or drawings and writing the result.

K.OA.A.2: Solve addition and subtraction word problems, and add and subtract within 10, e.g., by using objects or drawings to repr...

Students solve compare-type word problems, finding how many more or how many fewer by matching or counting on.

K.OA.A.2: Solve addition and subtraction word problems, and add and subtract within 10, e.g., by using objects or drawings to repr...

Students select from objects, drawings, or equations to solve mixed addition and subtraction word problems, explaining their strategy choice.

K.OA.A.2: Solve addition and subtraction word problems, and add and subtract within 10, e.g., by using objects or drawings to repr...

Students use ten-frames to determine how many more are needed to make ten from a given starting number, recording each pair.

K.OA.A.4: For any number from 1 to 9, find the number that makes 10 when added to the given number, e.g., by using objects or draw...

Students build fluency with all pairs of numbers that compose ten through games, flash activities, and quick-recall exercises.

K.OA.A.4: For any number from 1 to 9, find the number that makes 10 when added to the given number, e.g., by using objects or draw...

Students develop quick recall of addition facts with totals to five using games, ten-frame flash cards, and timed activities.

K.OA.A.5: Flexibly and efficiently add and subtract within 5 using mental images and composing/decomposing numbers up to 5.

Students develop quick recall of subtraction facts within five, connecting each subtraction to its related addition fact.

K.OA.A.5: Flexibly and efficiently add and subtract within 5 using mental images and composing/decomposing numbers up to 5.