College can be expensive. You need a plan. Costs vary from school to school. Generally private schools are more expensive than public schools. Not only consider tuition, but fees, books, supplies and living expenses, health insurance, childcare, and transportation, as well as spending money. All these expenses comprise what is called the Cost of Attendance or COA. The cost of attendance is different for every school, and varies from student to student.
Colleges use placement tests in subjects like math and English to check the academic skill levels of entering students. Then the college can place each student in classes at the right level.