Georgia K.MP.3
The Standard
Construct viable arguments and critique the reasoning of others.
Georgia's K-12 Mathematics Standards · Display perseverance and patience in problem-solving. Demonstrate skills and strategies needed to succeed in mathematics, including critical thinking, reasoning, and effective collaboration and expression. Seek help and apply feedback. Set and monitor goals.
Teacher's field guide
What This Standard Means
What Students Need to Do
- Students explain how they found a math answer using objects, drawings, numbers, or words. They listen to a classmate’s idea, check whether it makes sense, and ask or answer simple questions.
What Mastery Looks Like
- A student gives an answer and uses counters, a drawing, or counting words as evidence. The student checks another person’s idea and explains why it works or where it went wrong.
Common Misconceptions
- Some students think giving an answer is enough, without showing how they know. They may accept a classmate’s claim without checking it. They may also say an idea is wrong but cannot explain the error.
How to Assess It
- Show a card with six dots and say, “Mia says there are seven dots. Is she right? Show how you know.”
Lesson moves
Ways to Teach It
In pairs, students build eight with two-color counters, explain their count, then have a partner recount and ask one question.
Display two drawings for 4 + 2 and ask, “Do both show six? What in each drawing proves your answer?”
Play Reasoning Detective by reading counting claims while students show agree or disagree cards and explain their choices.
Set out five cups and six napkins, then ask students whether each cup gets one napkin and what must change.
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Printable K.MP.3 Worksheet
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