Addition and subtraction join and separate assessment and rubricName of Evaluator:
Read a problem to the student as many times as necessary. Ask them to show and explain as they solve the problems. Then ask questions to check their understanding.
- Sandra had 8 pennies. George gave her 4 more. How many pennies does Sandra have altogether?
- Sandra had 9 pennies. George gave her some more. Now Sandra has 12 pennies. How many did George give her?
- Sandra had some pennies. George gave her 5 more. Now Sandra has 12 pennies. How many pennies did Sandra have to begin with?
- Sandra had 13 pennies. She gave 8 pennies to George. How many pennies does Sandra have now?
- Sandra had 13 pennies. She gave some to George. Now she has 7 pennies. How many did she give to George?
- Sandra had some pennies. She gave 5 to George. Now Sandra has 9 pennies left. How many pennies did Sandra have to begin with?
Problem | Strategy used |
Without prompt |
With prompt |
Unable to do without significant help |
1. Join result unknown |
Join |
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2. Join change unknown |
Join |
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3. Join initial unknown |
Join |
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4. Separate result unknown |
Separate |
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5. Separate change unknown |
Separate |
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6. Separate initial unknown |
Separate |
Addition and subtraction with regrouping assessment and rubric
Ask the students to select two numbers (if the first two numbers can not create a problem that requires regrouping, ask for additional numbers until it's possible) Ask the student to create an addition and subtraction problem with the numbers and model a solution with manipulatives.
Without prompt |
With prompt |
Unable to do without significant help |
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Solved the problem correctly |
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Used manipulatives and accurate procedure |
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Used symbols (sticks and dots) and accurate procedure |
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Used paper and pencil and an accurate procedure |
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Used mental mathematics and an accurate procedure |
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Forgot to regroup |
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Solved the problem, and when asked what the numeral three and four stood for answered correctly. (You got 43 for an answer. What does the three mean? What does the 4 mean? What do they mean together?) |
Dr. Robert Sweetland's Notes ©