Collect examples of different types of rock from your local area (and from
further away if you want to) and take your pupils through this investigation sequence - using the clues in the rocks to find out how they formed. Begin with two rocks, one made from sediment, a sedimentary rock, with obvious grains (eg. a sandstone) and the other, a crystalline igneous rock with big crystals (eg. a granite).
The following Rocks Song by Peter Weatherall could be used with this ELI.
Click here for the video clip