This unique kit helps learners understand chemical reactions by exploring combinations that result in the production of gas formation of a precipitate change of color evolution of the intake of heat, The students record their observtions on the reproducible worksheets and then attempt to formulate a set of general criteria for the reaction, Enough materials are included: for 30 students working in pairs, Also includes comprehensive Teacher s Guide, Includes MSDS, Grades 7-12, American Educational Products have a lead ship time of 21 days, SKU: AMED1505