Translation of "Supervising" in French

Tom is supervising.

Tom supervise.

I'm not supervising you.

Je ne te supervise pas.

- You supervised the students.
- You were supervising the students.

Tu encadrais les étudiants.

The teacher supervising the playground became concerned when she saw a man talking to some of the children over the school fence.

L'institutrice chargée de surveiller la cour s'inquiéta lorsqu'elle vit un homme parler à des enfants par-dessus la grille de l'école.