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Atoms, Elements and Isotopes: K-12 TLC Guide
Molecular Theory: K-12 TLC Guide.

History of Science: K-12 TLC Guide

Chemistry: K-12 TLC Guide.
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This guide last edited 12/23/2011
This guide last revised 03/26/2010
This guide created 08/27/2006 on request from Marisa Hamilton, Texas City High School, Texas City ISD, TX