This lesson introduces students to the effects of climate change on glaciers. The resource sheet gives information what a glacier is, how they are formed and what the different types are. A card sort game is included, asking students to match terms to explanations, separate glacial inputs and outputs and place in order of importance. The resource sheet then goes on to describe the various ways in which scientists measure glaciers. The presentation can be used to stimulate class discussion. Students work out how a glacier forms, stays stable or melts as the climate warms up and then discuss the questions that arise. This resource was produced by the Climate Change Schools Project, funded by the Natural Environment Research Council and in association with the Department of Geography at Durham University and Science Learning Centre North East.