Tenwek High School managed a mean score of 7.798046 (B-; minus) in the 2019 Kenya Certificate of Secondary Education, KCSE, examination. The school registered a total of 307 candidates.
225 candidates scored a mean grade of C+(plus) and above; hence, booking direct tickets to university. 1 candidate scored a straight A. Candidates who scored mean grade of A- (minus) were 18 . Others scored B+ (48), B (56), B- (48) and C+ ( 54 candidates).
Here is the school’s 2019 KCSE Mean Grade Summary;
| MEAN GRADE | NUMBER OF CANDIDATES |
| A | 1 |
| A- | 18 |
| B+ | 48 |
| B | 56 |
| B- | 48 |
| C+ | 54 |
| C | 43 |
| C- | 24 |
| D+ | 10 |
| D | 4 |
| D- | 1 |
| E | 0 |
| x | 0 |
| TOTAL | 307 |