By the end of grade one, students understand and use the concept of ones and tens in the place value number system. Students add and subtract small numbers with ease. They measure with simple units and locate objects in space. They describe data and analyze and solve simple problems.

• 1.0 Students make decisions about how to set up a problem:

  1.1 Determine the approach, materials, and strategies to be used.

  1.2 Use tools, such as manipulatives or sketches, to model problems.

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• 2.0 Students solve problems and justify their reasoning:

  2.1 Explain the reasoning used and justify the procedures selected.

  2.2 Make precise calculations and check the validity of the results from the context of the problem.

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• 3.0 Students note connections between one problem and another.

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