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Learn all about atoms (protons, neutrons and electrons) and see historical models of them.

Simple explanation of the different types of levers

This gives a table of colors by which to identify different compounds in flame tests.

I admit this website is not well organized, BUT it has HILARIOUS pictures and diagrams of photosynthesis. The tree-hugger girl picture and its caption is uproarious. This site may help convince students the importance of photosynthesis when they complain how boring it is.

This website is clean and ad-free with short textbook modules on the different aspects of photosynthesis. It may be boring looking, but it gets straight to the point and has a self quiz at the end.

Description and diagram of the various types of matter. Provides sample questions and answers that help students differentiate among heterogenous and homogeneous mixtures, elements and compounds.

Basics about atoms, including structure and behavior.

A great site to help kids learn the difference between physical and chemical changes.