adding+and+subtracting

Resources for developing concepts of addition and subtraction and computational fluency with whole numbers
Word Problems from Math Playground website See "Word Problem Database" - Lots of word problems for helping students develop concepts and fluency with whole number operations

[|Sample "well-structured" problems for addition and subtraction.doc]

[|Strategies for Number Combinations.pdf] A list of "thinking strategies" for basic number combinations ("math facts"), from Hanlon Math Also see related resources at Southern Nevada Regional Professional Development Program (rpdp.net )

[|Strategies children use for addition and subtraction.doc] These strategies are developed in //Children's Mathematics: Cognitively Guided Instruction//

[|Alternative Algorithms and Strategies for Multi-digit Addition and Subtraction (ppt)] A good description of how fluency develops from strategies through algorithms, including alternative algorithms

[|Developing Computational Fluency with Whole Numbers in the Elementary Grades.doc] - a paper by Susan Jo Russell, co-author of Investigations

Computer simulation of working with Base-ten blocks

[|1-10 Addition Chart - Blank.pdf] A blank addition chart -- students can use if for many things, including keeping track of combinations they haven't yet mastered.


 * Many good on-line manipulatives are available at the National Library of Virtual Manipulatives.**