[l2k2c]

I really don't understand "Chemical equilibrium" leason. Can someone please help me. 

[Arkcon]

I don't think so.  Please trouble yourself to read the forum rules, posted in red, at the top of every page:

Saying something like, "I don't get kinetics can you explain it to me" or "what is a Clausius-Clapeyron equation?" will get you negative responses on this forum. There is no reason to ask a question cold with the amount of information available everywhere on the web. First try to look it up – use google or wikipedia – and come here once you get to the point you don't understand something. Asking question without even trying to research it first is just a sign of laziness, nothing else.

[Ben Bob2]

Often I don't understand a lesson in class. My next step is to usually read about it for myself, and then look for better lectures and problem set examples on youtube. You will learn much more in the long run than by simply asking. 
Le Chatelier's principle and equilibrium took me a while to understand, too, but it's doable.