I agree with H&T re the DH82a, great aircraft for spinning, I DO NOT recommend the Cessna or PA28 as they tend to degrade into a spiral dive and the instructor will tend to rush the exercise to get the patter in before the spin becomes the spiral dive, which can come over as panic and so worry the student. Beagle Pup spins well, don't try the Cap10 though until you are happy with spins as it develops quite a high rotation after a couple of turns.