Need that extra push after Reality Check.

I did it. I did it! But it isn't good enough.

I had a strange dream, I was in a classroom of people learning to lucid dream. I had several dreams inside my dream where I tried to become lucid.

But at one point I came back to the classroom and figured out I was dreaming. Reality check! I am indeed dreaming.
I felt myself become more lucid. :D

But I couldn't become completely lucid. I tried and tried, telling myself over and over I was dreaming, but eventually gave up.

Can anyone tell me what I should do after my reality check if it isn't enough?

I would suggest performing several different reality checks. Also, perform the ones that worked several times, so you can really implant the thought of lucidity in your mind. If you are still struggling try to do some simple things that wouldn't work in real life. Try to hover above the ground, move things with your mind, etc. Anything that will help you get that full feeling of lucidity.