Today we (or rather I) celebrated mistakes in my classroom. This is a no effort lesson plan that I rely on once in a while and is very effective.
Generate problems for the students to complete (more than enough for the class period). That's it!
I review a few examples with the students before we begin the 'activity'.
Randomly pick a student to choose a number from 1 to however-many-problems-you-generated. I write that problem on the board and the students complete it at their seats. I also warn the students to write neatly because their work will be displayed for the entire class to see.
Once the students have completed the problem I randomly pick a student and take a photo of their work with my iPad and display it on the apple TV. Warts and all.
Note: I am very unhelpful when the students are working on the problem at their seats. I want the class to see THEIR work, not mine. I tell the students that I LOVE when they make mistakes....it shows that they're trying and their brains grow when they make a mistake. This is great formative assessment.
I also enjoy the fact that the students can see that they are not the only ones possibly struggling this the topic. It's perfect to not be perfect.