We had a health checkup at school.

A doctor and two nurses came to our school. My hearing was good, and my eyes were not bad. I had two decayed teeth. There was a cavaty on each tooth. So I have to go to a dentist's to have the cavities filled in with amalgam or resin. The doctor said that I was in bad health. However, I had good news! I grew 5 cm from last year.
I don't need to wear glasses. Anyway, I will have to brush my teeth after eating.

(This is another version of the previous passage. Would you like to check the expressions? Thank you.)

Good!!

Don't forget to check spelling -- "cavity." And in the sentence about growing 5 cm, you should replace "from" with "since."

=)

"dentist's" should not be possessive ("...go to a dentist to have...).

Sure! Here's the revised version of the passage:

We had a health checkup at school where a doctor and two nurses visited. During the checkup, my hearing was found to be good, and my eyesight was not too bad. However, I was informed that I had two decayed teeth, each with a cavity. As a result, I need to visit a dentist who will fill in the cavities with either amalgam or resin. The doctor mentioned that my overall health was not great. On a positive note, I received good news! I have grown 5 cm since last year. Fortunately, I don't need to wear glasses. Regardless, it is important for me to remember to brush my teeth after eating.

Let me know if there's anything else I can help you with!