San Juan Diego Catholic High School operates on a semester system with seven class periods.
| English | 4 credits | |
| Mathematics | 4 credits | |
| Science | 4 credits | |
| Social Studies | 3 1/2 credits | |
| Economics (FES) | 1/2 credit | |
| Theology | 4 credits * | |
| Spanish | 3 credits | |
| Technology Applications | 1 credit | |
| P.E./Health | 2 credits | |
| Fine Arts | 1 credit | |
| Communication Applications | 1/2 credit | |
| Senior Seminar | 1/2 credit | |
| Corporate Work Study Program | 2 credits * | |
| TOTAL | 30 credits |
* Transfer students are required to earn one credit of Theology and one-half credit in the Corporate Work Study Program for each year of attendance at San Juan Diego Catholic High School.
In the hope of transforming students into caring individuals who generously respond to the needs of society, San Juan Diego Catholic High School requires that every student complete a minimum of 100 hours of service to the poor and disadvantaged of the community before graduation. To see the breakdown of these hours by grade level, click here.