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4434GeoGebra
http://www.merlot.org/merlot/viewMaterial.htm?id=436264
Algebra and Geometry shape and graph maker. Multi-use.Description by developer:GeoGebra is dynamic mathematics software for all levels of education that joins arithmetic, geometry, algebra and calculus. It offers multiple representations of objects in its graphics, algebra, and spreadsheet views that are all dynamically linked. Grid and Percent It
http://www.merlot.org/merlot/viewMaterial.htm?id=449423
In this lesson, students use a 10 × 10 grid as a model for solving various types of percent problems. This model offers a means of representing the given information as well as suggesting different approaches for finding a solution. This lesson is adapted from "A Conceptual Model for Solving Percent Problems," which originally appeared in Mathematics Teaching in the Middle School, Vol. 1, No. 1 (April 1994), pp. 20-25.Budgeting with Percents
http://www.merlot.org/merlot/viewMaterial.htm?id=449415
This is a full lesson plan for applying percents in a real life application.