write a letter to your principal suggesting for marcial act in your school
19 September 20xx.
Subject: Request for martial art classes
I, PQR, am a student of class VII A of your school. I am part of ABC House in the hostel. This is to request you to hire a martial arts expert to teach us self-defence techniques. In the present scenario, where nobody is safe from the violence of unsocial elements and criminals, it is imperative to learn self-defence in school itself. As ours is a residential school, we could easily have this class in the evening with the other co-curricular activities.
Thanking you in anticipation.