Also, regarding the parents being the best teaches.
.... this is an incomplete sentence. This is alright for your speaking task, but in writing you need to have formal and complete sentence structures.
In my opinion, Parents play a very important role in the beginning of our life by providing us with main things that make us have a tough background which goes with us in every new experience we are going to face during our life trip.
.... As dumi suggested, state your opinion in the introduction. Use your body paragraphs to give the reasons to justify your opinion and convince the reader on your justification by giving examples to support your reasons.