Glossary
What is the difference between a high wing and a low wing airplane?
Where the wing joins the fuselage, above the cabin or below it. A high wing gives a clearer view downward and shade on the ramp; a low wing gives a clearer view through a turn and puts the fuel tanks below the cabin. Both layouts are ordinary trainers and neither is the harder one to learn in.
That is the whole entry for now. The longer version, with the mechanics and worked examples, is still to be written. See autorotation for how those read once they exist.