This study investigated the impact of teachers on students' academic performance at Muhanga Secondary School in Kisoro District, Uganda. Employing a cross-sectional survey design, the research collected both quantitative and qualitative data from a sample of 260 respondents, including students, teachers, parents, and school administrators, selected through simple random and purposive sampling techniques. Data were gathered via questionnaires and interviews and analyzed using descriptive statistics in SPSS and thematic analysis. The results revealed distinct perceptions of teacher influence. Regarding qualifications, a majority of respondents (55%) associated them primarily with the timely completion of the syllabus, while only 30% directly linked them to improved student performance. A mere 5% believed qualifications automatically guaranteed good teaching. Concerning teacher experience, the main benefits were perceived as the acquisition of new teaching skills (40%) and improved subject content mastery (35%). However, experience was not strongly linked to increased teacher self-confidence, which only 5% of respondents noted. The study concluded that while both teacher qualifications and experience are fundamental to academic performance, their impact is mediated by institutional and motivational factors. Qualifications were predominantly valued for ensuring administrative efficiency (syllabus coverage), whereas experience was valued for enhancing instructional quality. A critical conclusion was that the full potential of the teaching staff was undermined by a significant gap in teacher self-confidence and a system that prioritized syllabus completion over deep, qualitative learning. It is recommended that the school administration and district education officers implement a differentiated continuous professional development program focused on advanced pedagogy and confidence-building, institute a robust teacher motivation and recognition scheme, and lead a strategic shift in institutional focus from quantitative syllabus coverage to qualitative learning outcomes. Strengthening school-community partnerships to reframe the value of education is also essential.