Teachers: To prepare for this activity, cut out the cards below and keep each set (of three) together with a rubber band or paperclip. For this activity, you will also print and cut cards from two other card sort pages: Arithmetic Expressions and Circles of Evaluation; we recommend printing each set in a different color. Note that this page includes three copies of the same set. You will need one set for every pair of students.
| Set 1 | Set 2 | Set 3 |
|---|---|---|
the sum of 15 and 3 |
the sum of 15 and 3 |
the sum of 15 and 3 |
the quotient of 15 and 3 |
the quotient of 15 and 3 |
the quotient of 15 and 3 |
the difference between 15 and 3 |
the difference between 15 and 3 |
the difference between 15 and 3 |
the product of 15 and 3 |
the product of 15 and 3 |
the product of 15 and 3 |
15 increased by 3 |
15 increased by 3 |
15 increased by 3 |
3 less than 15 |
3 less than 15 |
3 less than 15 |
15 tripled |
15 tripled |
15 tripled |
15 less than 3 |
15 less than 3 |
15 less than 3 |
add 3 to 15 |
add 3 to 15 |
add 3 to 15 |
divide 15 into 3 groups |
divide 15 into 3 groups |
divide 15 into 3 groups |
one-third of 15 |
one-third of 15 |
one-third of 15 |
These materials were developed partly through support of the National Science Foundation, (awards 1042210, 1535276, 1648684, 1738598, 2031479, and 1501927). 
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