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primary

Resources for ages 5-11 primary students
secondary

Resources for ages 11-18 secondary students

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early years

Early Years Foundation Stage; US Kindergarten Early years
primary

Key Stage 1&2; US Grades 1-5 Primary teachers
secondary

Key Stage 3-5; US Grades 6-12 Secondary teachers

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PD

Interactive environment

Four-layer Number Pyramid Interactivity

Age 11 to 14

Here is a Number Pyramid with four layers for you to explore.

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The NRICH Project aims to enrich the mathematical experiences of all learners. To support this aim, members of the NRICH team work in a wide range of capacities, including providing professional development for teachers wishing to embed rich mathematical tasks into everyday classroom practice.

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NRICH is part of the family of activities in the Millennium Mathematics Project.