Preface -- Margaret Brown: The Leverhulme Numeracy Programme -- The Context: Section Introduction. Introduction: The research aims and synopsis of book -- Explanations for low achievement; class, poverty, ethnicity -- Theory and Methodology: Section Introduction -- Theoretical Positions: A ‘social practice’ approach to numeracy; Numeracy events and practices -- Methodology: Exploring the relationship between home and school; domains and sites, case studies and critical incidents -- Case Studies: Section Introduction -- Children: a Seth (Mo)b Kim (Ta) c Antonia (Ro) -- Schools a Mountford b Tarnside c Rowan -- Themes: Section Introduction -- Numeracy Practices at School: Engagement, Coded Questions and Switching -- Numeracy Practices at home: Cultural resources -- Numeracy Practices: relations of Home and School -- Conclusion: Explanations for Low achievement -- Implications for Practice, Policy and Research.