The student was preparing his lesson

[Untaught88]

Is "The student was preparing his lesson" correct?

 

[Tarheel]

It would make more sense to say the teacher was preparing the lesson. As for the grammar, it's fine.

 

[Piscean]

Is "The student was preparing his lesson" correct?

That does depend on the context in which you wish to use these words.

 

[Untaught88]

What would be used for the student if he is learning the content of his lesson?

 

[Tarheel]

He's studying.

 

[emsr2d2]

He's preparing for his lesson.

 

[jutfrank]

What would be used for the student if he is learning the content of his lesson?

Do you mean that he already had a lesson and now he's reviewing what he learnt?

 

[Untaught88]

Do you mean that he already had a lesson and now he's reviewing what he learn

Yes. He had a lesson. Now he has to memorize it.

 

[Untaught88]

He's preparing for his lesson.

What's the difference between "for" and without "for"?

Does using "for" mean what I want?

 

[tedmc]

What's the difference between "for" and without "for"?

Does using "for" mean what I want?

To prepare for a lesson is to get ready/prepare for the lesson. If it is after the lesson, you say you study/revise the lesson/what you have been taught.

To prepare a lesson is to prepare to teach/give a lesson, usually done by a teacher.

 

[Tarheel]

It's been a long time since I was in a classroom, but the way I would prepare was show up.

 

[emsr2d2]

What's the difference between "for" and without "for"?

Does using "for" mean what I want?

As was suggested in post #2, I take "He was preparing the lesson" to refer to a teacher writing a lesson plan. I added "for" to avoid that confusion. With "for", the most likely interpretation is that it's the student talking/writing.

 

[emsr2d2]

Yes. He had a lesson. Now he has to memorize it.

In BrE, that's called "revising" or "revision". However, we have learnt from AmE speakers here that they don't use it that way.

 

[jutfrank]

The student was reviewing the lesson.

 

[Rover_KE]

Is "The student was preparing his lesson" correct?

As you can see from the above replies, without much more context your sentence is meaningless.