What's a block change? (Dunno if this is just not something I have gone over yet, or a terminology difference).

The main point was whether or not it is okay to take slow (or slow-ish - say driving in 2nd gear) turns with the clutch engaged (as I was shown), or whether it is dangerous (lack of motor control) and bad for your car 9because some say that the more you use your clutch, period, the worse it is for your car)?