This volume is part of a supplementary resource for 11-14 year-olds. The two pupil's books and the photocopiable teacher's guide introduce and practise both oral and written methods without the use of calculators. The series covers work up to National Curriculum level seven.;The pupil's books are designed for pupil practice, consolidation and extension. Two pages of carefully graded exercises are provided per lesson which reinforce and follow on from the lesson activities themselves. This material can be used for the rest of the lesson time or can be set as homework.;The series' approach: focuses on the mistakes and misconceptions common to pupils aged 11-14; helps prepare pupils for the National Curriculum non-calculator and mental arithmetic tests in Year 9; helps secure a proper understanding of common problems in basic number concepts; aids proficiency in number manipulation; develops and practises different mental strategies; addresses the role of estimation in mental methods; promotes pupil choice of appropriate strategies; offers careful treatment of written methods and algorithms; promotes pupil articulation and recording of methods; and supports teacher diagnostics and interaction with the class.