I have been studying English many teachers. Some of them say "See you in the lesson" while other say "See you at the lesson." Yesterday, one of them told me that the correct way of saying it is "See you at the lesson."

Are both of them correct? If one (or both) of them is incorrect, please tell me why?

I have been studying English with many teachers. Some of them say "See you in the lesson" while others say "See you at the lesson." Yesterday, one of them told me that the correct way of saying it is "See you at the lesson."

Are both of them correct? If one (or both) of them is incorrect, please tell me why.