National Humanities Center
National Humanities Center: America in Class: America in the 1920s: Religion & Science
The National Humanities Center presents collections of primary resources compatible with the Common Core State Standards - historical documents, literary texts, and works of art - thematically organized with notes and discussion...
Science Struck
Science Struck: Metric Measurements: Units and Conversions
Discusses how the metric system of measurement was developed and provides tables of unit conversions within the metric system, within the Imperial system, and between the two systems.