Teachers Create lesson plans and grade work for a lot of kids depending on how many students they have.If you teach kids in high school you will have A secondary teacher may see 200 students during the day in five classes, with 40 students per class.This changes on the highschool that you teach at and how many students you will have. Every aspiring K-12 educator can enroll in a 4-year bachelor's degree program.People that want to be a teacher has to go through many years of schooling.A teacher has to instruct children/teenagers depending on if they would like to teach highschool or Middle/elementry schoools.Teachers have many options on what subject they would like to teach they can teach science, mathematics, language arts, social studies, art, and music ect..