One strip of 8 related 35 mm images photographed through a microscope called photomicrographs. Arrows and call outs help the student locate important features. The film is mounted in a clear plastic holder that protects it on both sides.

Each microslide strip contains the following photomicrographs:
1. Sedimentary - red sandstone (50X)
2. Sedimentary - shell limestone (50X)
3. Igneous - Basalt (50X and x.n. 50X)
4. Igneous - granite - ordinary light (50X and x.n. 50X)
5. Igneous - proxenite (50X)
6. Metamorphic - mica schist (15X)
7. Metamorphic - mica schist - x.n. (50X)
8. Metamorphic - dolomitic marble - x.n. (50X)

Each microslide is accompanied by a detailed lesson plan designed to stimulate, inform, and question students about the topic under study. Each lesson plan has a pocket in which the microslide is stored. Lesson plans are printed on heavy card stock and will serve for repeated use.