Skip over navigation
Guide and features
Guide and features
Science, Technology, Engineering and Mathematics
Featured Early Years Foundation Stage; US Kindergarten
Featured UK Key Stage 1&2; US Grades 1-5
Featured UK Key Stage 3-5; US Grades 6-12
Featured UK Key Stage 1, US Grade 1 & 2
Featured UK Key Stage 2; US Grade 3-5
Featured UK Key Stages 3 & 4; US Grade 6-10
Featured UK Key Stage 4 & 5; US Grade 11 & 12
World of Tan 13 - A Storm in a Tea Cup
Children you may like to:
complete the silhouettes of two of the convex shapes that can be made;
find out what you can about the terms convex and concave. Find ways of explaining the ideas to your friend, family and teacher.
make a collection of things that are concave or convex or both;
invent an acrostic for both CONCAVE and for CONVEX (hint: Xray/ Xylophone/ Xmas..).
Parents you may like to:
explain your understanding of the terms convex and concave and how you remember which is which;
form a collection of things from around the house that are convex/ concave in design; e.g. a empty cup - is this convex or concave or both? what about a full cup?
explore what happens when looking in convex/ concave mirrors
find other words that are often used to mean convex/ concave Can you find a 7 letter word for convex? 8 letter word for concave? etc..
Teachers you may like to:
investigate the other 11 REMAINING convex figures that can be made using the tangram
explore when convex/ concave lens and mirrors are used and why.
explore more fully the mathematical definitions for convex and concave shapes (see below)
consider where terms like 'rude health' come from and try to list more that are similar
discuss in what other contexts animals are used to describe behaviour and other human characteristics? e.g. (Mai Ling) being badgered by the workmen horsing around! wolfing food down!......
Meet the team
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. More information on many of our other activities can be found here.
Register for our mailing list
Copyright © 1997 - 2014. University of Cambridge. All rights reserved.
NRICH is part of the family of activities in the
Millennium Mathematics Project