Estimating and approximating

problem

Big and Small Numbers in Chemistry

Age

14 to 16

Challenge level

Get some practice using big and small numbers in chemistry.
problem

The Fastest Cyclist

Age

14 to 16

Challenge level

Andy is desperate to reach John o'Groats first. Can you devise a winning race plan?
problem

Approximately Certain

Age

14 to 18

Challenge level

Estimate these curious quantities sufficiently accurately that you can rank them in order of size
problem

Big and Small Numbers in Physics - Group Task

Age

16 to 18

Challenge level

Work in groups to try to create the best approximations to these physical quantities.
problem

Archimedes Numerical Roots

Age

16 to 18

Challenge level

How did Archimedes calculate the lengths of the sides of the polygons which needed him to be able to calculate square roots?
problem

What Do Functions Do for Tiny X?

Age

16 to 18

Challenge level

Looking at small values of functions. Motivating the existence of the Maclaurin expansion.
problem

Cobalt Decay

Age

16 to 18

Challenge level

Investigate the effects of the half-lifes of the isotopes of cobalt on the mass of a mystery lump of the element.
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Building Patterns

Can you deduce the pattern that has been used to lay out these bottle tops?
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Let's Get Flexible!

In this article for primary teachers, Ems outlines how we can encourage learners to be flexible in their approach to calculation, and why this is crucial.