Textbook in PDF format This series has been endorsed by Cambridge Assessment International Education. Help learners engage with and fully understand topics they are studying with an emphasis on mathematical thinking and working throughout. Provide activities to increase student's subject knowledge and develop the skills necessary to think and work mathematically. Engage learners with chapter openers that include historical notes with a cultural focus. Support development of English language skills with the use of mathematical terms and activities to help facilitate effective teaching in classrooms with mixed English abilities