In a GCSE or KS3 maths lesson, students can expect to learn a variety of mathematical concepts, including algebra, geometry, trigonometry, and statistics. Teachers will often use a combination of lecture-style teaching, group work, and individual exercises to help students learn and practice these concepts. Students may use a variety of tools and resources, including calculators, textbooks, and online resources, to aid in their learning. By the end of the lesson, students should have a solid understanding of the day's topic and be prepared to apply their knowledge to real-world problems.