Addition+and+Subtraction+Problem+Types+and+Strategies

=Addition and Subtraction Problem Types and Strategies=


 * Join Result Unknown || Join Change Unknown || Join Start Unknown ||
 * Separate Result Unknown (SRU) || Separate Change Unknown || Separate Start Unknown ||
 * Part Part Whole, Whole Unknown || Part Part Whole - Part Unknown ||  ||
 * Compare Quantity Unknown || Compare Difference Unknown || Compare Referent Unknown ||

Direct Modeling:

Student has to directly see all of the pieces. They follow exactly what the problem says.



Counting:

The student counts everything, starting from one of the numbers in their head then counting up or down.



Facts:

The student uses fact strategies to problem solve.



** Resources **

__Cognitively Guided Instruction__ Carpenter/Fennema

Addition and Subtractions Problem Types: Chapter 2, pg. 7-12

Addition and Subtraction Solution Strategies: Chapter 3, pg. 15-31
 * Direct Modeling, pg. 15
 * Counting, pg. 18
 * Number Facts, pg. 24

=Invented Strategies=
 * Incremental || Combining Tens and Ones || Compensation ||