#### All numbers are not equal

An introduction to the various types of numbers which are recognised as important.

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It is hard to believe there was a time before batteries! Batteries and supercapacitors are at the heart of electric vehicles, portable devices (watches, laptops, mobile phones) and renewable resources like wind and solar, for energy storage. Bette....

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A short video showing a simple classroom method of checking the way in which this force is related to mass, speed and radius.

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An introduction into the writing down of fully balanced chemical equations. The process is explained starting with word equations, finding all the relevant formulas and then working with some useful rules for finding the correct coefficients in the b....

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A description and demonstration of the way in which craters formed by dropping objects into sand can be linked to some elementary physics

More details | Watch now#### Do Touch Ep 1 | Preserving Plant Material

**Introduction to systematics & DIY plant preservation techniques. **
In this first webisode of Do Touch, Daniel Domínguez invites young scientist and collectors to Label, love, & learn about the world. The aim of this seri....

#### Estimation – Educated Guesswork?

How can we make sensible estimates of very large numbers? It is often very important to know the size of an unknown number, at least to within a factor of ten.

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How can we represent fractions in the simplest way? Equivalence of decimal and common fractions.

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An approach to adding and subtracting fractions, using an understanding of the processes involved.

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