Toothbrush—tool for teeth cleaning   The head of the toothbrush cannot be too big. A toothbrush head with a length of a 50cents is most suitable for primary school students. Remember to use it to brush daily in the morning and at night before bed! Toothpaste—agent for teeth cleaning   Fluoride Toothpaste should be used. Fluoride helps strengthen the teeth and prevent tooth decay. A very small amount of toothpaste, about the size of a pea is enough.   1. Use a pea sized blob of fluoride toothpaste.   2. Hold your brush at an angle to the teeth and gum margin.   3. Brush the outer surfaces of two to three teeth at a time in back-and-forth motion. Brush each group of teeth for at least ten times. Remember not to brush too hard, otherwise you will damage your teeth and gum.   4. Then place the toothbrush at the inner surfaces of teeth. Brush two to three teeth at a time and repeat the teeth cleaning motion.   5. When cleaning the inner surfaces of front teeth, place the toothbrush vertically onto the surface of the teeth and brush from the gum upwards towards the crown of the teeth.   6. Lastly, we need to clean the chewing surfaces of teeth. Place the toothbrush on the chewing surface and brush back and forth.   7. Remember to clean all three surfaces of your upper and lower teeth.   Toothbrushing doesn’t clean the adjacent tooth surfaces of teeth (that is surfaces in between teeth). Dental floss is your good help. Remember to use it daily to clean the adjacent tooth surfaces of teeth.   1. Form a loop with a piece of dental floss that is about 20cm to 25cm long.   2. Control the dental floss with your thumbs and index fingers.   3. Pull the dental floss left and right to slide it in between teeth.   4. Pull the dental floss onto one side of the adjacent tooth surface, and pull it up and down to clean the tooth surface. 5. Pull the dental floss onto another side of the adjacent tooth surface, and pull it up and down to clean the other tooth surface.   6. Repeat the above procedure until every adjacent tooth surface is cleaned. Before you know how to use dental floss, you can ask your parents for help.