In the last session with third graders, all of them spoke in English all the time.
We did activities like…
I gave them different characters and they had to describe them. There were boys and girls with blond and brown hair, blue and green eyes…
Who is who:
This is the game all of us know, they had to ask questions to each other to find the character the other one had.
With these exercises, they used English to communicate and they learned new vocabulary. This way, they are acquiring knowledge and they were improving their speaking skills.