Geography, History and Civics Classes for competitive exams by SACHIN SHARMA will help you to prepare and crack it.

He is Intelligent and have great potential and teaching skills.
He has a great knowledge for his subject though his students appreciates him alot. For me he is a good teacher knows how to deals with students problem easily

Well my thinking for sachin sir as a trustworthy teacher is,
First of all he is a well experienced in this field of study and he is also having a deep knowledge of many geographical facts.
The thing which i liked the most in Sachin sir is the concept representative skill which is really good.
At last I want to say that the way of his teaching is so effective and awesome that the one can surely admits himself toward this man.

I would recommend Sachin as he has a very keen and thorough knowlegde of the subject.
He has immense creativity to make every topic interactive, so it is easy to understand.