eBook
University of North Carolina

University of North Carolina: Eric Notebook: Cross Sectional Studies [Pdf]

For Students 9th - 10th Standards
Explains what a cross-sectional study of a population is and how it compares with a cohort study. Its advantages, disadvantages, and limitations are discussed, and how it is used in studying health issues and risks. Includes two practice...
Unit Plan
TeachEngineering

Teach Engineering: Dams

For Teachers 4th - 6th
Through eight lessons, students are introduced to many facets of dams, including their basic components, the common types (all designed to resist strong forces), their primary benefits (electricity generation, water supply, flood...