Problem: Connie as 13 marbles. Five are red and the rest are blue. How many blue marbles does Connie have?
Direct Modeling and Counting Strategies: There is not a commonly used strategy corresponding to the action or relationship. Children generally use the Joining To, Separating From, Counting On To, or Counting Down.
Modeling
Join to:
5 + ? = 13 Students add blue cubes until they get to 13.
Separate to:
13 - ? = 5 Students separate the cubes until there are 5. Then they go back and count and see that there are 8 that would be blue.
Separate from: 13 - 5 = ? Students start with 13 cubes and separate 5 cubes from them. They count the remaining cubes to see that there are 8.
Part-Part Whole/ Part Unknown
Problem:
Connie as 13 marbles. Five are red and the rest are blue. How many blue marbles does Connie have?
Direct Modeling and Counting Strategies: There is not a commonly used strategy corresponding to the action or relationship. Children generally use the Joining To, Separating From, Counting On To, or Counting Down.
Modeling
Join to:
5 + ? = 13 Students add blue cubes until they get to 13.
Separate to:
13 - ? = 5 Students separate the cubes until there are 5. Then they go back and count and see that there are 8 that would be blue.Separate from:
13 - 5 = ? Students start with 13 cubes and separate 5 cubes from them. They count the remaining cubes to see that there are 8.
Counting
Counting Up to
Counting Down to
Counting Down to