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These three short online lessons discuss asteroids, comets and meteors.

This YouTube video delves into the impact that tourism can have on a country's economy.

This YouTube video delves into the impact that tourism can have on the environment.

This video explains how to calculate the gradient (slope) of a straight line.

This YouTube video explains how to calculate an irregular area on a map.

This YouTube video explains how to calculate a regular area on a map.

Other objects in the solar system are discussed in this online textbook viz. asteroids, meteorites, comets and dwarf planets.

This online interactive lesson discusses what reflections are and provides examples of reflections.

This online lesson explains what rotations are.

This video will look at rotation. Rotation involves turning a shape around a set point.