The year OCHS implemented its 4x4 it also eliminated its lowest level courses in English, math, science and social studies. In addition, a new administrative policy required the awarding of a final grade for all classes attempted. Doing away with all basic level courses and the change in reporting procedures accounted for 2% of the 3% increase in failures.
School officials also noted a 25% to 30% increase in the number of classes OCHS students were completing with the 4x4. Elimination of study halls, which is characteristic of 4x4 high schools, plus the availability of an eighth class explained this increase. OCHS students were completing more classes with grades of A's, B's, and C's than the total attempted under the seven-period day.
| Year | Total_Courses | A's | B's | C's | D's | F's | |
|---|---|---|---|---|---|---|---|
| 1987-88 | | | 23% | 11% | |||
| 1988-89 | | | 18% | 10% | |||
| 1989-90 | 24% | 29% | 17% | 11% | |||
| 1990-91 | 25% | 25% | 16% | 14% | |||
| 1991-92 | 27% | 28% | 15% | ||||
| 1992-93 | | 27% | 14% | ||||
| 1993-94 | 26% | 22% | 12% | 12% | |||
| 1994-95 | 26% | 21% | 11% | 12% | |||
| 1995-96 | 25% | 22% | 12% | 12% | |||
| 1996-97 | 23% | 22% | 14% | 13% | |||
| 1997-98 | 24% | 24% | 15% | 12% |