[Grammar] On the lesson

[englishhobby]

At the lesson the teacher explained new rules to the pupils. Can we say on the lesson?

 

[Barb_D]

Not in my dialect.

 

[englishhobby]

And how about "IN the lesson"?

 

[Barb_D]

Yes, or "during."

 

[MikeNewYork]

At the lesson the teacher explained new rules to the pupils. Can we say on the lesson?

I think Barb's suggestion "during" is the best.