ESS Grade 11 By cg20 Sep 1, 2022 Foundations of ESS (16h) Oct 10, 2022 Ecosystems and ecology (25h) Jan 10, 2023 DP exams Jan 23, 2023 Biodiversity and conservation (13h) Mar 6, 2023 Water ecosystems (15h) Apr 17, 2023 Soil ecosystems (15h) May 22, 2023 End of year exams