Here are some tips:

No.1:Setting goals

When you are going to study something new,you should set a goad for yourself.That will make you focus on the objective while you are studying.

No.2:Simulation teaching

Pretending you are a real teacher,you teach your students this knowledge.It is good idea to have a real person to listen to you.So that you can get feedback from them.You can check that whether you express enough clear.You should note the parts which you are not sure or don’t understand.Figuring out all the parts that you need to learn again.

No.3:Looking for materials to learn again

In step 2,you have already know which parts you should do more research.In the end,you resolved all the parts which you hadn’t known.

No.4:You should teach again.till the listeners understand.

You should simplify the expression while teaching the knowledge.In this stage,you could summary you knowledge point with simplification words.

Good luck everyone!