High School Students

In my mind, Many high school students go to prep school in order to prepare for college entrance exams, and some go even on Sundays.
 Is that fact?
Yes. High school seniors in particular have to study from morning to night, seven days a week.

in my mind,  私のイメージでは、
prep school ﾌﾟレﾌﾟ ｽｸｰﾙ　n)予備校 =preparatory school ﾌﾟﾚ パﾗﾄﾘｰ ｽｸｰﾙ
senior シｰﾆｱ n)年上、最上級生　adj)年上の、最上級生の