University of California
Uc Berkeley: Radio Spectrum
From a course titled "Structure and Interpretation of Signals and Systems." A discussion of the entire radio spectrum, listing wavelength and frequency values for its various parts. The uses of each region of the radio spectrum is...
Other
Faa: Education
Are you looking to explore the world of aviation? The FAA has created an educational resource page with aviation curriculum and career guides. Lots of great activities!