Khan Academy
Khan Academy: Dependent and Independent Variables
In this exercise, students practice identifying dependent and independent variables. Students receive immediate feedback and have the opportunity to get hints and try questions repeatedly.
Khan Academy
Khan Academy: Factor Polynomials Using Structure
Factor complex polynomials (i.e. polynomials of various degrees and or with two variables) using special product factorization methods. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a...
American Chemical Society
Middle School Chemistry: Lesson Plans: Does Temperature Affect Dissolving?
Young scholars identify and control variables to design an experiment to see whether the temperature of a solvent affects the speed at which a solute dissolves.
American Chemical Society
Middle School Chemistry: Lesson Plans: Can Liquids Dissolve in Water?
Lesson plan with mulitmedia links in which young scholars identify and control variables to help design a solubility test for different liquids in water.
Other
Warm Air: Heat Loss
An excellent page describing the variables which effect the heat loss through homes. The causes and sources of such heat loss are identified and explained. Lays the groundwork for understanding the importance of and need for home heating...
Other
Warmair.com: Heat Gain
An excellent page describing the variables lead to rising temperatures in the home. The causes and sources of such heat gain are identified and explained. Lays the groundwork for understanding the importance of and need for home air...