Designing Ranking Tasks
I think the Ranking Task has room in your science or math classroom. I’ve run across a few in texts, on concept inventories, and in Modeling Physics materials but never made any for myself. “Hold your horses, Megan,” I hear you saying. What?! You’ve never seen a ranking task?
Officially, “Ranking Tasks are an innovative type of conceptual exercise that asks students to make comparative judgments about a set of variations on a particular physical situation.” Let me give you an example from Kelly O’Shea:
Here’s the brilliance I see in the displacement question Kelly asks. Say you’re a freshman in my physics class and you just learned the distinction between displacement and distance. I ask you to rank A-F in the above image. I imagine this internal dialogue (monologue?):
- A and B look the same but I’m guessing that 25 on the y-axis is important.
- C and D are straightforward displacements, the “easy” ones.
- Good gravy! What am I supposed to do with E?
- Whoa Nelly, F is even worse than E. I need to check the definition of displacement.
There’s understanding a definition then there’s applying that definition. Do you love Ranking Tasks yet?
I tried writing my own, wasn’t happy with the results, so I went for a walk on the newish Atlanta Beltline. We saw some amazing art, a skatepark, and spent time with family. Yeah, winter break rocks.
But I digress…
When I got home I realized what I was doing wrong — I tried making the ranking task without a clear idea of exactly what I was testing knowledge of. Wait, what? You mean I hafta think this out before I start drawing graphs? Oh okay…
- Draw about 2 items that are straightforward applications of the definition/idea being ranked.
- List the learning goals and common misconceptions.
- For every item in #1, design a picture or graph to address it.
I’m a rank n00b at these Ranking Tasks, but the Amazon writeup had good-sounding advice I’ll include here, too.
The basic structure of a Ranking Task comprises four elements:
- a description of the physical situation, including any constraints and the basis for ranking different arrangements
- a set of figures showing the different arrangements of the situation to be compared
- a place to record the ranking of each variation
- a place to explain the reason for each ranking choice
I’ve seen a lot written about Ranking Tasks in physics. The book I referenced above is specifically for physics, but why couldn’t these work in math? Off the top of my head: rank these fractions, rank these irrational numbers, or rank these radical expressions without evaluating directly.
Global Math Department in 2013 is gonna be hot! Join us Jan 8 for an Ignite-style meeting. Teachers will take the stage for 5 minutes each, armed with 20 slides auto-advancing every 15 seconds. The topic? My Favorite classroom ideas.