Georgia State University
Georgia State University: Hyper Physics: Sound Level Measurement
Home page for a hypertext physics course. Users can access subjects ranging from the sound wave parameters that effect hearing and communication to OSHA worplace standards.
US Geological Survey
U.s. Geological Survey: Repeat Photography Project
The Repeat Photography Project pairs historic images with contemporary photos thus documenting glacial decline through photography while communicating the effects of global warming.
Buck Institute
Pbl Works: Pbl Essential Elements Checklist
[Free Registration/Login Required] The PBL Essential Elements Checklist can be used for a quick evaluation of a project's design, to see if it includes all the essential elements of rigorous, effective PBL. Use this tool before, during,...