This resource from the National Library of Virtual Manipulatives shows students how to rename fractions to have a common denominator and then add them. It is appealing because it visually engages the students by showing them what happens to a unit (a rectangle is used here) as the denominator increases or decreases. As the denominator increases or decreases, the partitions are shown accordingly, and the effect on the numerator is shown as well. This is a convenient, visual way to show students how to manipulate fractions for adding.

Kahn Academy video - How to add and subtract fractions with like and unlike denominators.

"Students create their own Mystery Numbers by giving clues about the name, value, and multiples of the digits which comprise the number." from Beacon Learning.

Khan Academy video tutorial with practice exercises. Introduction to averages and algebra problems involving averages.

This lesson asks students to explore the motivation behind characters' actions in To Kill a Mockingbird. Students first engage in a freewrite activity. They then do research and creative thinking to design a poster and plan a presentation representing a psychological profile for a selected character, while determining what specific factors (such as family, career, environment, and so forth) have the greatest influence on the characters' decision making throughout the novel. The groups present their findings to the class by assuming the persona of their character and explaining the psychological factors influencing their behavior in the novel.

Khan Academy video tutorial. Solving one and two step equations-this is made slightly more difficult than the Simple Equations tutorial by adding constants to the variable term.

Khan Academy tutorial video that uses Excel spreadsheet and actual income data to predict annual income and expresses why lines and models are useful and interesting.

This game allows students an opportunity to identify different kinds of rocks based on an actual photograph of the rock as well as characteristics of the rock, which are also shown.

"Students compute the measures of central tendency (mean, median, and mode) and range and determine how outliers affect the measures." from the Beacon Learning Center.

Khan Academy video Apply and extend previous understanding of multiplication and division and of fractions to multiply and divide rational numbers

This video shows how to determine which lines are parallel from a set of three separate equations.

Khan Academy Video Tutorial. Introduction to basic algebraic equations of the form Ax=B

In this lesson, students will be viewing a Khan Academy video that will show how to convert ratios using speed units.

"This lesson uses graphic models for finding perimeter and for creating formulas relating to perimeter." (Beacon Learning Center)