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In this activity, learners use measurement concepts to make models of what their body parts might look like if they were a snake or a chameleon.

In this activity, learners make pretend snakes and use them to explore estimation and measurement. Learners roll out clay snakes and estimate and measure their lengths and diameters.

In this math lesson, learners explore the concept of using units to measure length.

In this activity, young learners use different-sized paper 'caterpillars' and various household items to predict and measure their height.

An ordinary camera has a lens that makes an image on film. In a pinhole camera, a small hole replaces the lens.

Did you know that using a lens one can bend light to make pictures of the world? It's true!