Twelfth grade

Twelfth grade (also known as 12th grade, grade 12, senior year, or class 12) is the twelfth year of formal or compulsory education. It is typically the final year of secondary school and K–12 in most parts of the world. Students in twelfth grade are usually 17–18 years old. Some countries have a thirteenth grade, while other countries do not have a 12th grade/year at all.