The last year of high school is 12th grade and is also referred to as senior year. High school is made up of four years of school with 12th grade being the final one. Students that complete 12th grade will graduate and then move on to life after school. Some may decide to continue their education while other may move into the workforce.
If you need more information about high school I have written several articles that you can take at next:
How Many Grades Are In High School?
How Old Are You When You Graduate High School?
Allen is an 8th grade teacher in a Chicago suburb. Learn more about him on this page.