K.3

K.3 is a knowledge and skills statement. These are the student expectations under it.

• K.3.A

  model the action of joining to represent addition and the action of separating to represent subtraction

• K.3.B

  solve word problems using objects and drawings to find sums up to 10 and differences within 10

• K.3.C

  explain the strategies used to solve problems involving adding and subtracting within 10 using spoken words, concrete and pictorial models, and number sentences

01

What Students Need to Do

Students show joining and separating with objects, drawings, and number sentences. They solve story problems within 10. They tell how their model shows what happened.

02

What Mastery Looks Like

Students correctly act out and draw joining or separating situations. They solve sums and differences within 10. They explain how their objects, drawing, and number sentence match the story.

03

Common Misconceptions

Students may choose an operation from the numbers instead of the story action. They may count the objects removed rather than those left. Drawings may not match the number sentence.

04

How to Assess It

Give this exit ticket: “Mia has 6 blocks and gives away 2. Draw what happens, write a number sentence, and explain your answer.”

1. 01

   Give pairs counters and story cards. Students act out each story, draw it, and write the matching number sentence.

2. 02

   Ask, “How did you know whether to add or subtract?” Have students explain using their drawing and counters.

3. 03

   Play Change the Train: build five cubes, draw an add or take-away card, change the train, and state the new total.

4. 04

   Set up a snack problem with crackers, such as three on a plate and two added, then solve it before snack time.

• 6.10

  The student applies mathematical process standards to use equations and inequalities to solve problems

• 1.3

  The student applies mathematical process standards to develop and use strategies for whole number addition and subtraction computations in order to solve proble...

• 6.3

  The student applies mathematical process standards to represent addition, subtraction, multiplication, and division while solving problems and justifying soluti...

• 7.3

  The student applies mathematical process standards to add, subtract, multiply, and divide while solving problems and justifying solutions