Free posters from Omega
 

http://www.omega.com/literature/posters/

Here are the posters (may be cool for a home schooler or just a freeloader):

Free Omega Giant Posters!

U.S. FREQUENCY ALLOCATIONS:
Illustrates frequency band allocations for the U.S. radio spectrum,
with color coded service blocks.

ROCKETS OF THE WORLD:
Perfectly scaled full-color rendering of rockets from 1912 to the present day.

SPACE SHUTTLE PATCHES:
Shows the unique arm patches designed for each mission,
along with complete mission summaries.

DIMENSIONLESS NUMBERS:
Alphabetical listing of scientific equations which produce dimensionless number results.