Confused by basic fractions? Scared of fractions? Want to learn how to add, subtract, multiply, or divide really complicated fractions? Let's start with a basic introduction to fractions. You're used to working with whole numbers such as 1, 2, 3 etc., but fractions allow you to go in between. Here are some good lessons that will introduce the concepts of fractions:
Introduction to Fractions (from the BBC)
Varnelle's Primary Math (mathforum.org)
NRICH Introduction (Maths.org)
Once you've got a handle on what a fraction is, you will want to do things with fractions. It's easy enough to add 1/4 to 1/4, but how do you add 1/3 to 3/7? How do you divide fractions? Check out these lessons on performing arithmetic with fractions:
Adding Fractions (FreeMathHelp.com)
Dividing Fractions (FreeMathHelp.com)
Multiplying Fractions (FreeMathHelp.com)
Adding and Subtracting Fractions (themathpage.com)
Adding and Subtracting Fractions (math.com)
Multiplying Fractions (math.com)
Multiply and Divide Fractions (themathpage.com)
Multiplying Simple Fractions (sosmath.com)
Looking for even more help with fractions? Guaranteach, a major math video site, has provided over 500 free videos in their fractions category!