Is there any best teaching method for teaching a particular subject?

Make it interesting.  As the teacher understands the material to be learnt the student may not.  I try to take what is not known and compare it to something that the student understands.  Taking a known to an unknown helps to cement the concept.  For example when taking about the tallest man I would say, depending on the age, "he would have to bend over to walk through that door way."