The Grennian Curriculum covers all 12 years of mandatory education. Schools are divided into primary, middle, and high schools.

Students usually wear uniforms, but the style depends on the school. Most uniforms are composed of black trousers, a tie,
and a V-neck cotton shirt over the tie (sometimes emblazoned with a school emblem or logo.)

Students and teachers are absent on public holidays.

Grades 1-6 are primary school.
Grades 7-9 are middle school.
Grades 10-12 are high school.

Subjects taught:
Math
English
Japanese
World History
Grennian History
Science
Biology (high school only)
Chemistry (high school only)
Physics (high school only)

Students may choose to participate in elective subjects with a parent's consent. Below is a list of possible electives.
- Optional 3rd language (Arabic, French, German, Hindi, Italian, Korean, Mandarin, Portuguese, Polish, Russian, Spanish)
- Music
- Art
- Home Economics
- Coding and Digital Literacy

If a student in high school has a job, they are allowed to take up to 2 days off school per week to contribute to their job.

Tuition is free, paid for by tax. Private schools do exist for religious reasons or to provide for students with special needs.

During the end of Year 12 students participate in the Grennian Final Placement Test (GFPT), which determines their skill and knowledge of various subjects.
It is equivalent to a university entrance and placement exam.