Maths Investigator is a secret spy agency whose mission is to make maths fun and exciting. The series has been extensively trialled and developed to offer schools a fresh and exciting way to combine the content and structure of the 2006 Mathematics Framework with the principles of the Primary Strategy 'Excellence and Enjoyment' guidance - to raise standards whilst making learning fun. The Maths Investigator approach focuses on developing the key skills of problem solving, speaking and listening, and using and applying maths. It uses the engaging spy context and fully integrated software components to embed maths into problem solving and give pupils a clear purpose for learning. The Teacher's Guide provides clear, flexible lesson plans to support both confident mathematicians and less-experienced teachers. With straightforward planning based on the 2006 Framework and creative teaching ideas, it helps raise standards as well as making learning fun. Unique planning mind maps provide 'at-a-glance' overviews of teaching throughout each unit, making clear links between core areas of maths to ensure blocks of work are relevant and meaningful. Extra support and challenge activities make differentiation easy, whilst assessment for learning questions help identify and address misconceptions. For flexibility, Teacher's Guide units are packaged in topic packs. Each pack contains three two-week units of work, including access to the associated Interactive CD unit. MI3 TEACHER'S GUIDE TOPIC PACK C: CALCULATIONS (Addition/Subtraction/Multiplication/Division) + INTERACTIVE CD ACCESS contains units: 3 The case of the sick cat (16pp) 8 The case of the mystery meal-snatcher (16pp) 13 The case of Mr Plum's plans (16pp)