Few classroom events are more satisfying to a teacher than when that one student says something that brings it all together and the rest of the class joins in with OOooohhhhh! A recent from something I added to WHP 1200-Present Unit 2, is when one one my students, learning about Aztec Engineering in this History Channel Video asked, "bit what if somebody wanted to mess with them, couldn't they just cut off the aqueducts from the shore?" As the lesson progressed, other kids started thinking along the same lines, calling out hints and clues to Cortes, like "he can block the causeways!" (which he took to heart and practice. What are some Aha! moments you can share that show that they are making these connections and THINKING?