Hi DT',
A superstall is related to swept wing aircraft. As the tips stall first the Centre of Pressure moves inboard and forward. This produces a nose up tendancy which further decreases speed and increases AoA. This is known as a deep stall (superstall) and is of course not very desirable feature of a swept wing aircraft.
The T-Tail element is there to confuse people... as the main wings are stalled the tailplane can effectively be blanked out of the free stream airflow making the tailplane ineffective or total loss of control in regards to pitch. This, together with swept wings, is not good!
However my groundschool instructors have said swept wings are the main contributor to the deep stall.
As a wing of an aircraft stalls at a certain AoA no matter the speed then the AoA indicator can be used to detect the upcoming stall...
As for the stall strips. I believe they are referring to the strips that are located near the root of a wing to "induce" a root stall first (desirable). Have a look at a Piper Tomahawk... they have stall strips near the root on the leading edge.
Increasing the flap selection will decrease the L/D ratio thus reducing the glide range.
I'll come back to you with the CL max and lift coefficients, although I believe if you increase the flap setting but you keep the AoA the same, the lift coefficient will increase.
However if you are staying in straight and level fligth at a constant airspeed then increasing flaps will momentarily increase the lift coefficient but you will need to lower the pitch attitude and thus the AoA to ensure the lift co-efficient remains the same, otherwise a climb would ensure.
Hope this helps for now and I'm hoping this is correct as I have PoF and Perf exams in two weeks time!
Best wishes,
Charlie Zulu.