Teacher: Teacher Qu.
Activity objectives:
1, knowing that acidic substances will corrode teeth;
2, can tell the harm of several kinds of dental caries;
3. By watching cartoons, learn the five steps of tooth prevention and know the common sense of protecting teeth;
4. Cultivate children to develop good hygiene habits.
Activity preparation:
1, egg shell, biscuit, cup, vinegar, mirror
2. Soak eggshells in vinegar two days before class (with children);
3. Pictures of the process of dental caries and five steps of tooth prevention.
4. A tooth model and a toothbrush.
5. Comic book "Tiger's Mouth Pulls Tooth" >
6. Some word cards
Activity flow:
First, introduce the theme by watching cartoons; Why does the tiger keep barking? It turns out that he likes sweets and doesn't brush his teeth. After a long time, bacteria drilled several holes in his teeth.
Second, look for the cause of dental caries.
1, the teacher let the children eat cookies, then rinse their mouths, and then observe what happens to the clear water? We all know that people leave food residue between their teeth after eating. ) Show pictures.
2. "There is a bacteria in our mouth that will make these food scraps sour (show pictures). If it takes a long time, what will happen to our healthy teeth? Let children think about what will happen first, and then show pictures (show pictures)
3. "What does it feel like to let the prepared egg shell be tapped by the child with chopsticks? (Hard) Then observe and see what's in the cup. That's the egg shell that we soaked in vinegar two days ago. See what's changed now.
4. Discussion: Why do eggshells turn black and soft? Vinegar is sour and will corrode the calcium in the eggshell, so the eggshell turns black and becomes soft.
5. Teacher's summary: There is a kind of bacteria in our mouth, which will make food residue sour. After a long time, these acids will corrode the calcium in our teeth like vinegar, and the teeth will turn black, resulting in tooth decay, that is, dental caries. We also call it tooth decay.
3. What are the hazards of dental caries? Learn the five steps of tooth prevention and know the correct methods of tooth protection.
Fourth, the game "Protect your teeth and have health" (end)
Methods: Choose one child to play "Toothworm", one child to play "tooth protection and rehabilitation", and the rest children to play "teeth" and follow Kangkang. "Toothworm" will catch "tooth" and "tooth protection" will prevent "tooth worm" from protecting "tooth". Let children know how to protect their teeth through experiments and games.
(More lesson plans are in: Teacher Qu's lesson plan network)