The Math League
The Math League: Ratio and Proportion
This tutorial provides definitions and examples of ratios and proportions and features comparing ratios and converting rates.
Texas A&M University
Wtamu Virtual Math Lab: Beginning Algebra: Reading Graphs
A good introduction to reading bar, line, and double line graphs, and drawing and reading Venn diagrams. Contains definitions and examples of these types of charts and graphs as well as practice exercises that ask you to answer questions...
Khan Academy
Khan Academy: Picture Graphs (Pictographs) Review
Picture graphs are a fun way to display data. This article reviews how to create and read picture graphs (also called pictographs).
Khan Academy
Khan Academy: Bar Graphs Review
Bar graphs are a nice way to visualize categorical data. This article reviews how to create and read bar graphs.