If you are having a hard time stopping try this: Skate in a straight line forwards and when you get a little bit of speed stop skating and glide with your knees bent and feet shoulder width apart.
Straighten your legs and lift your shoulders up to the ceiling.
Turn your head in the direction you are trying to stop, then your shoulders and your hips. This will turn your toes in the same direction as the rest of your body. Once your whole body has turned put the weight back on your skates by bending your knees.
Remember to keep your shoulders, knees and toes in the hockey player position.
Repeat and try turning your head in the other direction. If you don't take the weight off your skates, you are forcing the blades down and this will scrape or create snow.
It is important to stand up straight so that your weight is off your skates and it is easier for the blades to turn on the ice. This drill will help you learn to control the weight on you're skates and give you proper balance by keeping you're head up and your feet shoulder width apart.