Concept Formation: A Model for Inductive Thinking
Here's are the steps for running an inductive lesson based on Hilda Taba's model of Concept Formation. Plus a sample lesson about the Nile River.
When differentiating, it's helpful to note where on the "spectrum of abstraction" your content lies. Then, see what happens when you move that content to be more abstract or more specific. It often unlocks lots of new opportunities for thinking.