This Teacher’s Guide supports the 8-book Collins series covering the full Cambridge International AS & A Level Mathematics B syllabus (M800/M900), for examination from 2028. The series builds key skills and knowledge for a wide range of careers and further study. This book will not go through the endorsement process for the Cambridge Pathway.• Supports planning for using Collins resources for the Cambridge International AS & A Level Mathematics B syllabus (M800/M900), with detailed syllabus coverage mapping for each book of the series.• Highlights key dependencies of knowledge and prior learning, and includes suggested timings for each topic, to help teach effectively and confidently.• Includes route maps for all the combinations of AS and A Level options, enabling you to easily personalise the course for your cohorts.· Full worked solutions for every student exercise in the eight Student’s Books are available to download, so you can have confidence in your students’ workings.The Collins course consists of 8 Student’s Books, a combined Teacher’s Guide and a digital subscription on Collins Hub. This Teacher’s Guide will not go through the endorsement process for the Cambridge Pathway; we are working towards endorsement of the accompanying Student’s Book for the Cambridge Pathway.