The higher educational institution where this study took place is located in the Dominican Republic. The purpose of this study was to provide insights to the effectiveness and impact of the instructional process applied in a Basic English class under overcrowding conditions, implementing an in depth interview to the faculty members and an eight-student focus group in each cluster (the experimental and control group) to interpret the instructional process when implementing a blog page and cooperative group work activities to improve the students' proficiency. The quantitative research findings were obtained from the pre and posttests to compare the experimental group in relation to the control group. T-tests were used to obtain the results in the pre and posttests, in order to determine if there were significant differences between the experimental and the control group. Whereas, the qualitative data were accessed through two focus groups with the students and an in depth interview with the professors. The participants' opinions were used to compare the instructional process when implementing a blog page and cooperative group work activities. Findings showed a holistic view of the instructional process under these conditions. The implementation post-test outcomes show the two-tailed p-value 0.0017< 0.05 of the Alpha level, which means that this difference is considered to be very statistically significant and the qualitative data analysis confirmed that there is evidence that the use of the instructional techniques improves the students' proficiency under overcrowding conditions that could not be avoided due to the lack of budget and space.