Information in the textbooks is presented in a series of linked, but self-contained double page spreads, so you can teach topics in the order that suits you best. * Higher Tier material is differentiated in the text and questions.* The text is clear and readable with attractive illustrations to make science enjoyable for students.* Questions are carefully graded to help students develop a real understanding of key ideas.Flexible and cost effective - all the modules are published separately (in packs of 10) as well as in two compendium volumes. Volume 1 includes all modules assessed by end of module tests while Volume 2 contains all modules assessed in the terminal exam.