Maryland Department of Natural Resources
Eyes on Dissolved Oxygen
Learn about the factors that affect the way oxygen dissolves in salt water with a chemistry lab. After studying the molecular structure of water, young scientists figure out how aeration, temperature, and organic waste affect dissolved...
Humanities Texas
Primary Source Worksheet: Excerpt from the Diary of Union Soldier Samuel Cormany
Young historians read and analyze a soldier's direct account of his participation in the battle of Gettysburg, as well as consider the overall strategy and tactics taken by the Union and Confederate troops.
Curated OER
Balancing Equations Online
In this balancing equations worksheet, students use an on line source to answer questions about balanced equations and they write balanced equations for various types of reactions. They balance equations using an on line game that allows...