The document summarizes a study that investigated the effects of a Process-Genre Based Approach (PGBA) on the written English performance of computer science students in Nigeria. The study used a quasi-experimental design with a treatment group that received PGBA instruction and a control group that received traditional lecture-based instruction. Results from statistical analysis showed that PGBA had a significant positive effect on students' overall written performance and on specific attributes like organization, content, expression, and linguistic accuracy. The approach was also equally effective for both male and female students. The findings suggest that PGBA is an effective methodology for improving polytechnic students' writing skills in Nigeria.