There are 35 kids in each class at elementary school and they have 6 classes a day.
Elementary schools have 35 students in each class and the students have 6 periods every day.
ーThere are 35 kids in each class at elementary school and they have 6 classes a day.
「小学校のそれぞれのクラスには３５人の生徒がいて、１日６時間ある」
elementary school で「小学校」
to have 6 classes で「６時間授業がある」=「６つの授業がある」
ーElementary schools have 35 students in each class and the students have 6 periods every day.
「小学校は各クラスに３５人いて、毎日６時限ある」
to have 6 periods で「６時限ある」
ご参考まで！
カナダ 
