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Lesson Plan
National Council of Teachers of Mathematics

The Math Forum: Lesson Plans: Fractions

For Teachers 3rd - 5th
Teachers, this is the place to come for fraction lesson plans if you teach elementary students. All the topics have a number of resources available from which to choose.
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Handout
The Math League

The Math League: Decimals, Whole Numbers and Exponents

For Students 4th - 8th
This tutorial has definitions and examples of decimals, whole numbers, and exponents. In addition, a variety of topics are covered, such as comparing, multiplying and subtracting.
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Interactive
Discovery Education

Discovery Education: Web Math: What Is a Fraction?

For Students 9th - 10th
This WebMath site provides an interactive fraction solver which not only brings back an answer, but also includes a full visual description of what a fraction is and how the answer was accomplished.
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Lesson Plan
National Council of Teachers of Mathematics

The Math Forum: Intro to Fractions for Primary Students

For Teachers 3rd - 5th
This site from the Math Forum is a series of lesson plans with great ideas and an excellent Web site that uses virtual manipulatives with students.