A lesson used that matches OCR spec and textbook pages 160-161. Starter: Pupils discuss health profiles of characters (from makingsenseofhealth.org.uk) website. Construct: Pupils brainstorm about diseases and how we can classify them. Apply: Pupils complete a table to compare diseases caused by viruses,bacteria, fungi and protoctista. Plenary: Pupils circulate the room asking each other questions. Extension: Card sort of pathogens - 2 viruses, 2 bacteria, 2 fungi, 2 protoctista.