When I had US training in the 90s, stall and spin recovery were taught, but only stall was supposed to be practiced. I was told that spin was not because it co

When I had US training in the 90s, stall and spin recovery were taught, but only stall was supposed to be practiced. I was told that spin was not because it could damage some of the instruments which have gyros. We did it anyway (in a Cessna 152), and it only took about 1.5 turns to recover. Great fun. Easiest way to induce a spin was flaps down during stall.