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72

Copyright © 3P Learning – These resources have been created in partnership with Dr. Marian Small.

For more information visit

www.mathletics.com

Rubric

Level 1

Level 2

Level 3

Level 4

The student cannot

solve the problem

without help.

The student does not

convincingly explain why

his or her solution is

correct or not.

The student determines

one way that 8 coins

could be worth less

than 7 coins, but the

difference between the

two values is too great.

The student may or

may not correctly

explain why the solution

is correct.

The student does

not address why,

theoretically, fewer coins

can be worth more.

The student determines

one way that 8 coins

could be worth slightly

less than 7 coins.

The student can explain

how he/she knows the

solution is correct.

The student does not

clearly explain why fewer

coins can, theoretically,

be worth more, not just

in this one case.

The student determines

at least two ways that

8 coins could be worth

slightly less than 7

coins.

The student clearly

explains why fewer coins

can, theoretically, be

worth more, not just in

this one case.

Coins

Number