The professional learning community (PLC) is considered to be an effective school improvement strategy centered on student achievement. The goal of this study was to introduce the PLC approach in a few public elementary schools in Cameroon to evaluate the causal impact of this organizational model on student learning. A quasi-experimental approach was used involving an experimental group and a control group. Student pre- and post-tests were administered in two core subjects (French and mathematics) at both the beginning and the end of the first year of operation as a PLC. Our findings show a significant improvement in the students' results between the pre- and post-test. The PLC was qualified as being in its initiation stage of development, when members focus on their students' outcomes and collectively engage in solving the latter's learning-related difficulties.