Students, many of you will recall our study of chemical equations. (Reactants on the left, Products on the right, an arrow instead of an equals sign; sound familiar?) The link provided here will connect you with an excellent interactive model of chemical equations. Use this to practice the skills of counting atoms and molecules as well as evaluating the balance of an equation. Use the introduction portion of the program first to get warmed up, then go on to the game version. I challenge you to get past the 1st level and go on to two or three!