Activity objectives:
1, get a preliminary understanding of the causes of dental caries and know how to protect your teeth.
2. Master the correct brushing method.
Activity preparation:
1, heard the story of "toothless tiger", eggshells soaked in vinegar.
2, toothbrush, dental mold.
Activity focus: Understand the causes of dental caries and know how to protect teeth.
Activity flow:
1, recall stories and discuss:
Teachers ask questions and children discuss:
-"We have heard the story of the big tiger without teeth, so why did the tiger pull out its teeth?"
Children check each other for dental caries;
-"How did we get dental caries?"
2, understand the formation of dental caries:
Comparison between eggshells soaked with vinegar and eggshells soaked without vinegar;
-"Last time we put eggshells in vinegar, what changes did you find?"
Encourage children to touch the eggshell with their hands and compare the differences between the two eggshells:
-"teeth are like eggshells. After eating, there will always be some residue left in the teeth. Bacteria grow in these residues and produce something called lactic acid. It will turn yellow and black after a long time, and some even have small holes. "
3, learn the correct way to brush your teeth:
The teacher demonstrated the correct brushing method with the model of teeth;
-"Dental caries will harm our health. Only brushing your teeth in the morning and evening can prevent dental caries. "
"When brushing the front and back of the teeth, the toothbrush should be brushed up and down; Brush the teeth inside, the toothbrush should be brushed horizontally; After brushing your teeth, the saliva swells a few times in your mouth to rinse the foam in your mouth. "