Twenty First Century Science is a suite of complementary specifications offering flexible and exciting options for science at GCSE. It is unique in having been extensively trialled over three years with more than 6,000 students in each year. It is motivating, stimulating and relevant. The specifications and resources are the products of close collaboration between the University of York Science Education Group, the Nuffield Curriculum Centre, OCR, and Oxford University Press. The Entry Level course contains 39 items which schools select from, including: Extinction, Casualty, Field to Plate, My Genes, Body Wars, Cooking and Cleaning, Fibres and Fabrics, Restless Earth, Fuels, G-Force, Rocket Science, Deep Impacts, and Wireless Communications. A comprehensive set resources is available: a textbook which uses engaging, up-to-date science contexts; and, a Teacher and Technician Guide covering the whole course.