Student or Learner
John is a teacher. He makes his classes/lessons lively.
Class and lesson are countable or uncountalbe nouns. Am I right to use a plural noun in the above sentence?
I'm not a teacher, but I write for a living. Please don't ask me about 2nd conditionals, but I'm a safe bet for what reads well in (American) English.
Actually 'lesson' is only ever countable, but the answer to your question is still 'yes'.