Continuous assessment is a major national curriculum innovation in Ghana but has been subject to limited research. Current literature has shown that diagnostic and formative assessments which can be purposes for continuous assessment are powerful in improving student learning and learning outcomes. This study sampled 158 junior secondary science teachers in two education districts in Ghana and surveyed them to determine the status, purpose and quality of continuous assessment in junior secondary science. Interviews with students, teacher educators and education officers, and students' focus...