I'm not sure if you're looking for input or not but in case you are could I suggest a few tweaks?
You might want to be a bit more specific in the subject or else more general in your descriptions to avoid confusion.
For example you say "the wing is the long piece on top". That tells a reader which part of your particular drawing you're talking about but it's not really a description of a wing. The wing can be long or short, it can be at the top, bottom or anywhere else on the plane; there can be more than one, etc....
You can't cover everything without getting confusing so I'd suggest just saying that the diagram illustrates the terminology for a typical high wing, propellor driven plane.
For the control surface descriptions it might be a good idea to use the same format for each. For example:
The aileron is used to make the plane roll left or right and is used to turn the plane in combination with the elevator. The aileron on one wing goes up and the other goes down. The plane will roll towards the upgoing aileron.
The elevator is used to pitch the plane up or down and is used to change the angle of attack so the plane climbs or dives, slows down or speeds up. On a conventional plane when the elevator goes up the tail is pushed down so the nose points upwards.
etc...
Hope this is useful and best of luck with the website.
Aidan
