Just make sure you facilitate the task properly. If you listen to the latest MMM podcast, #25, they want that you need to be clear to know what the students should get from the task, and solve the task the way you anticipate your students will.
The great thing about teaching is that the choice is up to you.
George is definitely right, but I also look at the ratio of time with would take the set up the problem or the materials for the problem vs what the kids will get out of it. I think that is huge for me since I only have 40 minutes to teach.
This is a great question and super common. More and more I’m realizing that it’s less about the task itself and more about your intentionality of what you hope to achieve with it. George and Shawn have provided some great insights here and I’d argue that focusing on what you want to elicit is key… Finding ‘a’ task and thinking longer about how to make it achieve your specific goals will probably be the best use of time, IMO.