We are pleased to present the South African Trends in International Mathematics and Science Study (TIMSS) National Reports. South Africa participated in the TIMSS for the fifth time in 2015. TIMSS assesses learners in mathematics and science, as well as exploring the relationship between school and home contexts and learner performance in these subjects. In 2015, South Africa participated in TIMSS at the Grade 9 level, and for the first time at the Grade 5 level.