Education Development Center
Tune in to Learning: What's a Fraction
Use this interactive lesson to learn about fractions. You will find equivalent fractions, compare fractions, and more. Immediate feedback is given to your answers. Links to related videos.
University of Texas at Austin
Mathematics Teks Toolkit: To Be (Half) or Not to Be (Half)
Explore part to whole and part of a set with interlocking cubes.
Other
Help With Fractions: Rules and Definitions
The rules and definitions of fractions are clearly explained at this website. Numerators and denominators are illustrated and explained. This is an excellent place to get the basic foundation for fractions.
Alabama Learning Exchange
Alex: Understanding Fractions
In this lesson the children will demonstrate parts of a whole using a candy bar (or fruit), and piece of paper. The activities are used as instructional plans to help students better understand shapes and parts of a shape up to a whole....
Other
Math Snacks: Atlantean Dodgeball
Ratio errors confuse one of the coaches as two teams face off in an epic dodgeball tournament.
University of Georgia
University of Georgia: Intermath: Denominator
This one page website provides a definition for denominator and numerator. It also give examples.
The Math League
The Math League: What Is a Fraction?
This tutorial helps students to understand fractions. It explains what denominators and numerators are using simple graphics.
Wikimedia
Wikipedia: Fraction
This one page website provides a basic explanation of a fraction and its denominator and numerator.