Balancing Chemical Equations
The website contains simulations for many topics in chemistry. There are videos illustrating chemical reactions, limiting reactant, isotopes and atoms, building an atom to name a few. This is a must see site.
Many simulations at this site address the CLEs.
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eduToolbox® is a resource-sharing portal developed by the Ayers Institute for Learning & Innovation with collaborative support and funding from the Tennessee Department of Education and the U.S. Department of Education's Math & Science Partnership program.