The intended function of wing flaps is to increase the decent angle without increasing airspeed. When using flaps for landing, you should slow the airplane to just above normal approach speed before deploying the flaps. This will help to prevent ballooning. The flaps will tend to cause the airplane to pitch up. Be ready to lower the nose slightly when you add the flaps. Flaps cause a lot of drag, so either a little more nose down or a sight power increase will be required.