This is one of the most controversial lessons on the curriculum and it always produces excellent and thought provoking history for able secondary students. Students work through detailed information on the bombing of Germany before being drip-fed 41 pieces of precise historical information. They have to compile these in groups into evidence which suggests it was morally right to bomb Germany (it took anti aircraft guns away from the Eastern Front for example) and evidence which suggests it was morally wrong (even Churchill by March 1945 felt the bombing should be reduced). This in turn leads to great student debate. I really hope your classes get as much from this very stimulating lesson as mine do.