英検準１の作文　減点になりそうなところは？

減点になるところはどこじゃろうか？？

TOPIC
Do you think children have to study during summer vacation?

POINT
Children's happiness
Length of vacation
Academic competitiveness
Teachers' workload

Most of children like to play and dislike studying so during vacation, the children spend less time to study. We need to have them studied extra. First, the vacation is too long for them to lose their habit of study. If they can study without our help to study, it isn’t necessary to force them study. But most of them don’t study. Second, studying is to their brain what playing is to their physical. Both of them are very important for their future and make it much happier. Playing is important for their health and studying is for understanding today difficult society. For these reason, children have to study during summer vacation so as not to lack study time, and luck their habit of studying.

修正済み箇所
×dislike to do → ○ dislike -ing　
×nessecally → ○ necessary
×fisical → ○ physical

forceの使い方が怪しい？
習慣はhabitじゃないほうがいいかな？
論じ方も弱い気がする。