Class E and G Airspace Explanation
Air Flow Over Terrain (from the Hang Gliding Federation of Australia)
Soaring Weather and Techniques (from the Glider Handbook and Shasha Varlamov)
1-2-3 Thermalling Method (from Eric Carden with the Condor Soaring Simulator and the LK8000 Tactical Flight Computer)
How Does a Wing Actually Work (from Veritasium and Minute Physics)