Friday Fave for April 20

Which Is Steepest? is neither big nor splashy, but plays a very important role. In a tight seven screens, this activity takes from gut instincts about slope to probing the consequences of the formal definition.

Which segment is steepest?

How can you check?

Make a segment with in-between steepness

What might a student who thinks the blue segment below is steeper be thinking?

Is zero steepness a thing? What about infinite steepness?

All of the big, important, introductory questions about slopes of graphs surface for classroom discussion in seven short screens. That’s why Which Is Steepest? is this week’s Friday Fave.

And while you’re thinking about slope, have a look at these other great activities, too.

Land the Plane

Slanty Hills

Investigating Rates of Change