I make short, to-the-point online math tutorials. I struggled with math growing up and have been able to use those experiences to help students improve in math through practical applications and tips.

Through January 2009, the San Francisco Airport Museum is featuring an exhibit on how airliner seating has evolved. On display are seats from a Ford Tri-motor, Fokker F-10, Boeing 80A, 247, 727, and ...

Gold, a precious metal, mostly appears in alloys and only rarely in its pure form. Because of its physical properties, it is resistant to air, moisture, heat and many solvents. Gold also has a high ...

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