"To start with the lesson I suggest we do a paring project Mathilda told her class. "Therfore I ask you to find yourself a partner. If any possible it should be mixed pairs of a boy and a girl."
The pupils looked at each other Not only were they naked but they had to pair with the opposite sex, tooo. Slowly couples found each other leaving two boys without a partner.
"Ah! So we have ,or boys than girls in this class. But you should not worry about that." Mathilda snapped her fionger again and one of the boys started to change.
"I suggest that especially the boys should look carefully as you will be able to see the start of a female puberty now."
While Mathilda said this the boys features began to change. His hair bgrew longer and his face became smaller and so dud his arms and legs. His penis and testicles seemed to be pushed inside his body leaving only a slit between his legs. He shrank in size until he looked like a girl of 9 years.
"Now you have the chance to experience what girls go through in puberty. You will see how your body developes. Yoz will learn a lot about the female body within a sgort time as your "puberty" will only last ten minuteys"
Soon the boy started to grow breasts. They were very small in the beginning but could not be mistken for just fat soon as aslo his nipples grew. In the ende he had a nice pair of b-cups like most of the other girls in class. While her breasts grew the rest of her body also changed. She grew some inches her stomach thinned while her butt grew. Some pubic hair appeared around her vagina.
Suddenly she felt cramps inside her stomach and wastched with fear a strain of blood running out of her vagina down her legs.
"You have just experienced you first period. That means you are a fully functional woman now." Mathilda turned to the class "You have seen now how a girls body changes when she goes through puberty. The first period indicates a specila point in this process. As I told all girls become fully functional females at that state. They are able to become pregnant and give birth to a child. Has any of the other girls had her first period already?"
5 girls put their fingers shily in the air. But the other 7 didn't move.
"So you five know what we just saw here. And you seven will soon know."
The other seven girls ived through their puiberty. Their breasts grew a little an oubic hair was thickening around their clits. Finally they all started bleeding.
"I shall fix that bleeding now." Mathilda snapped her fingers again and the cramps in the bodies of the menstruating girls stopped and all the blood that came out of them vanished.
"Now to you boys. As you will definitely knos their are also changes in the bodies of boys when they go through puberty. You grow pubic hair around your penis. Your voices become deeper and some of you have to shave their faces regularly. You will start having "wet dreams" when you think of girls causing you to ejaculate. Has any of you boys already gone that far in puberty?"
There were no fingers up.
"OK! As the girls have lived through their puberty you boys also should." She snapped her fingers again
What happened to the boys was not as visible as it was with thev girls. Bitb when they started talking you could hear their deeper masculine voices. Some of the boys grew beards and finally all 13 of them had an ejaculatioin spurting their sperms througfh the class.
"What a mess" Mathilda said. "I'm going to fix this." She snapped again and the cum vanished.
"Now listen, class! You have seen and exoperienced how puberty is for girls and for boys. I want you to turn to your partners now and interview them about how they felt in each state of their puberty. The hirls should write a short essay about male puberty as the boys should do about female. There are ten minutes tim to go in our lesseon so you will have enough time for your interviews."
At the end of the lesson Mathilda snapped her fingers one more time and the cildrens clothes appeared again as did the door and the windows. The class was back to normal again exept that one boxy was missing and one girl had joined. And all of the kids looked a liitle bit older now.