Ясоставила предложения, но не могу с грамматикой разобраться, ну порядок слов исправьте ошибки: 3 in our school there are subjects in elective. they are distributed on profiles. in our school no report cards. we used diaries. we do not have school uniforms. but students must dress in business style. in school i often miss my home. but my classmates and not boring. i think biology most bright subject in school. this is one of my favorite subjects.

Я бы так написал 
In our school there are electives. They are distributed on the profiles.
In our school, no report cards. We use diaries.
We do not have school uniforms but students must dress in business style.
At school I often homesick. But my classmates and me not bored.
I think biology is the brightest object in the school. This is one of my favorite subjects.