Table 2.

Sample Additive Schema Intervention

Week	Schema	New information introduced to students
1	-	Addition; subtraction
2	-	Solving equations; labeling charts and graphs
3	Combine	Attack strategy; Total unknown
4	Combine	Total unknown
5	Combine	Part unknown
6	Combine	Problems with three or four parts
7	Compare	Difference unknown
8	Compare	Difference unknown
9	Compare	Lesser unknown
10	Compare	Greater unknown
11	Compare	Review combine and compare
12	Change	End unknown
13	Change	Change unknown
14	Change	Start unknown
15	-	Review combine, compare, and change
16	-	Review combine, compare, and change