Learners culture bacteria, yeast and mold with this popular kit. They also study algae and protozoa from pond water they provide. Kit contains: sterile growth containers, media, cultures of mixed bacteria, yeast and mixed mold. Background material and discussion questions for both qualitative and quantitative observations are included in the reproducible student worksheets. Enough material for 30 students to work individually. Includes MSDS. Grades 7-12.