The First World War. Eugh. What can you remember from studying the First World War? Probably Franz Ferdinand (the band?), alliances, the Kaiser, war, machine guns, blood, mud, the Somme, nasty Douglas Haig, poppies, Treaty of Versailles, The End.
Some people find this fascinating on its own and need no convincing about how interesting the First World War can be. This is good because in most schools we study it for at least a term (normally 20 or so lessons). However, I think that the personal stories of the First World War are probably the most interesting aspect of this piece of History.