This resource is ideal as a revision lesson prior to students taking their GCSE maths - covering bisecting angles, perpendicular bisector of lines and applying these to answer loci questions. It is aimed at GCSE students doing the foundation paper (grades 1 to grade 5).There is a publisher document that can be printed onto A3 paper (as a booklet) so it can be folded and given to students to write on. Consists of 4 pages: Page 1 - teacher models how to bisect an angle, draw the perpendicular to a line and draw a region within a certain distance from a point (see image). Page 2- students practice bisecting angles and drawing the perpendicular to a line. Page 3 and Page 4 - six practice loci questions where pupils have to find the region within the triangle / rectangle that satisfies the criteria (e.g. within 4cm of point A , closer to line AB than AC , closer to point A than point B).There is a powerpoint resourse alondside that the teacher can use to model answers. Ideally, the teacher will use a visualiser to demonstrate on screen how to perform the bisecting using compass and ruler.