CK-12 Foundation
Microscopes: Focal Point
The 1590s saw the invention of the first compound microscope. Scholars learn about how microscopes work and how to properly focus one. The lesson stresses the science fields that use microscopes and the difference between electron...
Curated OER
The Life Cycle of a Frog
Students read a book about a frog and the stages of its life. They read the description cards given and work in groups to study all of the wells of the frog life cycle. Finally, students identify and interpret various slides and...
Curated OER
Visit the Salt Marsh
Students visit the salt marsh. They work in groups to answer questions on their worksheets. Students also work in groups to collect information. They are given an introduction to the salt marsh. Students properly store and label...
Smithsonian Institution
National Museum of Natural History: Department of Invertebrate Zoology
Search the Invertebrate Zoology Collection, and read about original research performed on all 30 major invertebrate animal phyla except insects.