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Brushing your teeth is very important. Some do not know the proper way to accomplish this task. First, you put a dime size amount of toothpaste on a toothbrush. Brush the top right side of your teeth, in a circular motion, all over the teeth. After 20 seconds, switch to the top left side of your teeth and repeat. Repeat four more times with the rest of your teeth. When done brushing, rinse your mouth clean with water. Make sure to clean the brush as well! You're finished! You now have beautiful, clean teeth.
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The author's purpose is to inform or explain something the reader.