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High School — Mathematics
Number, Number Sense and Operations


Core Resources

    Number, Number Sense and Operations


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      Online Resources

      Here are some websites that will help you in Number, Number Sense and Operations. Scroll further down this page to see links to Math Instructional Resource Databases.

      Instructional Resources for Number, Number Sense and Operations

      Square Roots Without a Calculator
      This handout from Drexel University's Math Forum explains a simple process to calculate square roots by hand.

      Draining the Swimming Pool
      In this lesson from the Illinois Institute of Technology, students estimate how long it will take to drain a specified volume of water through a variety of small tubes.

      Math Instructional Resource Databases

      NCTM Standards
      This site contains the entire contents of the National Council of Teachers of Mathematics Principles and Standards for School Mathematics.

      Figure This!
      Part of a joint project from NCTM and US Department of Education, this site provides a variety of Standards-based "challenges" for students to try.

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