Hi
Include the prompt in your essay. That makes easier for us to provide you with more relevant comments :)
Every parent is generally most concerned about the development of their children so that parents almost instinctively devote themselves to cultivating their offspring.
... cultivation what? good values? good morals? .... you need to speicify
From my perspectives. I agree that students should go in for school's extracurricular activities
...no full stop
I believe that students should engage in extracurricular activities in school that help them develop their personality.In a sense,it's more diverse and thoughtful for students to participate school's extracurricular activities.
... this is not a reason... you need to state the reason. We know it's important. Tell why it's important!