Curated OER
Pure Substances and Mixtures
Students compare and contrast the properties of substances and mixtures. In this chemistry lesson, students simulate spontaneous mixing by performing a short class activity. They differentiate heterogeneous and homogeneous mixtures.
Curated OER
Pollution Solution
Fourth graders examine how trees help to absorb the pollution that is emitted from automobiles. They review the process of photosynthesis and determine how forest management is important on their reservation. They think about the...