This unit uses story problems to help students develop strategies for learning basic addition and subtraction facts and for computation using one- and two-digit numbers. Students are encouraged to demonstrate their thinking processes in computation, using a variety of methods and tools, including objects, pictures, number lines, and counting forward or backward. Students will:

- select and use appropriate operations to solve story problems.
- demonstrate multiple addition and subtraction strategies to solve single- and double-digit problems.
- use what they know about addition to help them with subtraction.

How are relationships represented mathematically?

How can expressions, equations, and inequalities be used to quantify, solve, model, and/or analyze mathematical situations?

How can mathematics support effective communication?

How can patterns be used to describe relationships in mathematical situations?

How can recognizing repetition or regularity assist in solving problems more efficiently?

How is mathematics used to quantify, compare, represent, and model numbers?

- How can expressions, equations and inequalities be used to quantify, solve, model, and/or analyze mathematical situations?
- How are relationships represented mathematically?

The possible inclusion of commercial websites below is not an implied endorsement of their products, which are not free, and are not required for this lesson plan.

- http://www.ixl.com/math/grade/first/ (requires paid membership after reaching practice limit)
- www.nctm.org
- http://illuminations.nctm.org
- www.aaamath.com
- www.dr-mikes-math-games-for-kids.com
*Young Mathematicians at Work: Constructing Number Sense, Addition, and Subtraction*by Catherine Twomey Fosnot and Maarten Dolk. Heinemann, 2001.- www.oswego.org/ocsd-web/games/DogBone/gamebone.html interactive hundreds chart
- www.apples4theteacher.com/math.html#interactivenumbercharts interactive hundreds charts
- www.mathplayground.com/thinkingblocks.html story problems
*Navigating Through Number and Operations in Prekindergarten – Grade 2*by National Council of Teachers of Mathematics, Inc. NCTM, 2004.- http://illuminations.nctm.org/Activity.aspx?id=3566 How Many Under the Shell? game
- http://www.funbrain.com/linejump/index.html interactive number line addition activity

Final 3/14/14

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