Students must pass the Proficiency Tests of the State of Ohio in reading, writing, citizenship, mathematics, and science.

Twenty-four (24) credits are required for graduation. These requirements are:

• 4 Units of Religious Education (or 1 Unit for each year of attendance at St. Thomas Aquinas High School)
• 4 Units of English
• 3 Units of Social Studies (Government, American History, World History)
• 3 Units of Science (1 Unit of Biology and 2 Units of either Chemistry, Astronomy, Geology, Great Inventions, Ecology, or Foundations in Science)
• 3 Units of Mathematics
• 0.5 Unit of Physical Education
• 0.5 Unit of Health
• 6 Units of Electives

Since a diploma from St. Thomas Aquinas High School is symbolic of the student's participation in the total educational mission of the school; and since that participation extends to spiritual, academic, social and financial responsibilities with the concept of Christian justice; and since graduation is the public ceremony by which the students who have fulfilled the criteria are recognized; each student, in order to participate in all of the graduation ceremonies, will have:

1. Met the Religious Education requirements of St. Thomas Aquinas High School;
2. Earned the necessary number of academic credits;
3. Paid all outstanding bills by May 1 of the senior year;
4. Met all disciplinary responsibilities; and
5. Passed all required Proficiency Tests.

In order to be promoted from one class level to the next, the following number of credits must have been earned:

• Freshmen to Sophomore 5.75 credits minimum
• Sophomore to Junior 12 credits minimum
• Junior to Senior 18 credits minimum
• Senior Graduation 24 credits