When you listen to something when you are sleeping will you remember it?

Question

When you listen to something when you are sleeping will you remember it?

like if you put a radio teaching a whole school lesson will you remember it when you wake up?

Answer 1

For years companies have made educational audio lessons made to be played while you sleep.  I think the studies have proven that that method is an inaccurate way of learning.  But, what studies have proven is that when it comes to retention of material the best time to study something is within the first 20 minutes of waking up.