Illustrative Mathematics
Illustrative Mathematics: 7.rp,ee Gotham City Taxis
The purpose of this task is to give middle schoolers an opportunity to solve a multi-step ratio problem that can be approached in many ways. The site includes a task and the solution.
Khan Academy
Khan Academy: Units
In this exercise, students solve word problems that involve using different units. Students receive immediate feedback and have the opportunity to get hints and try questions repeatedly.
Discovery Education
Discovery Education: Web Math: K 8 Math
This WebMath site shows how to add, subtract, multiply and divide through a step by step examples. The user simple selects the operation and types in two numbers, and the computer solves the problem through a step by step process. Also...
Lawrence Hall of Science
The Math Page: Skill in Arithmetic: Proportionality
Acquire a deeper understanding of the concept of proportionality. Concise definitions, detailed examples, and an interactive worksheet to apply what you have learned.
ClassFlow
Class Flow: Proportions
[Free Registration/Login Required] This lesson contains notes and examples for instructing how to solve proportions. Begins with relations to equivalent fractions, and then gets into solving algebraically using cross products. It...