This study of I-Kiribati secondary school teachers used a project-based approach to investigate the notions of school-based and collaborative learning as a suitable model for in-service teacher continuous professional development (CPD). The design and methodology adopted by the study framed the argument that since collaborative behavior is integral in Kiribati and Pacific community daily life it could be a suitably applied in the workplace to promote effective learning. At the same time the study was designed to investigate a system of learning for teachers in Kiribati that would address their needs, in particular being school-based. The study revealed that cultural influences in Kiribati such as: the role of leaders, respect for elders and secret knowledge have a strong influence on teacher behavior both inside and outside the classroom. The recommendations concur with research literature that suggests developing effective policy and practices in the Pacific region must be driven by and strongly reflect cultural practices, values and beliefs. Importantly, the notion that some cultural practices may conflict when applied in different settings provides an added dimension to the body of literature.