Some public schools in UAE lack competent teachers. Therefore, some students face problems in getting through their classes, particularly in math, computer, and physics.
impersonal conclusion. you don't have enough word to waste on theories or universal truths
so what pleasure do you find it it? it frankly sounds more like a work to me, but that's not bad. i myself wrote about my community service. However, you HAVE to say why you're having pleasure doing it (outside the simple fact that you enjoy helping people, which makes you sound simple, a bit unrealistic, and totally just wanting to find something that can help your profile, which is the goal, but can't be done blatantly)
and see how you talk more about the impact you made on others than the benefit you got form it? you need to focus on you, especially when you only have 100 words.
btw, the MIT essays are RIDICULOUSLY hard, cuz they really limit your words, and want to see your ability to convey emotion as well as pertinence in short essays.