In this interactive and animated object, students distribute the valence electrons in simple covalent molecules with one central atom. Six rules are followed to show the bonding and nonbonding electrons in Lewis dot structures. The process is well illustrated with eight worked examples and two interactive practice problems.

In this interactive lesson, students examine the quantitative relationship between chemicals in a balanced mathematical equation.

In this interactive object, learners determine the limiting reagent and the excess reagent in chemical reactions. Learners test their knowledge by solving three problems.

Learners observe that the melting of a solid and the freezing of its liquid occur at the same temperature. The melting point is an intrinsic property and is used to identify a substance.

Learners complete a matching exercise as a quiz or as a review of state laws and rules pertaining to barbers and cosmetologists.

In this interactive object, learners identify the feelings and values that motivate them and others to take responsibility for improving ethics in the workplace.

Students read about the process of hair growth beginning with the joining together of amino acids.

In this animated object, learners examine how changes in pH affect the salt bonds in strands of hair.

In this learning activity you'll review steel rule measurement.

True & False computer ettiquitte.

Review For Chemical Reactions reviewing types of reactions, enthalpy, balancing and predicting products.

Legalism/Daoism/Confucianism

How to be safe and prepared when it comes to lab work and experiments!!!