Human geographical topics include crime, development, globalisation, trade and interdependence, population and migration, rural environments, tourism, transport and communications, urban environments, shopping patterns and places. KS3 geography bbc bitesize has some great information on physical geography topics like weather and climate, coasts, ecosystems, rock landscapes, glacial landscapes, natural hazards, rivers and water. History has some great info on the British empire, Nelson Mandela, Martin Luther King, Rosa Parks, Mary Seacole, Tutankhmun and Ancient Egypt, The Victorians and World War 1& 2, Ancient Rome, Anglo-Saxons, Vikings, Ancient Greeks and Henry VIII.
Geography has some great info on different countries and on different environments like volcanoes, tsunamis, rainforests, deserts, climate change, rivers and tornadoes.