Earlier this year in a math marking center, I created a quick reference poster for teachers to use that reminded them of the difference between a level 1, 2, 3, 4 and 5 statement that justified their student's mathematical arguments. While I myself love to argue, and many of our students do as well, they can't seem to get the hang of it in mathematical situational problems.
Thus, THE POSTER. Ideally you'd use this framework and create something like this with your students that really compares the different levels of arguments but if you're pressed for time or looking for some direction as to where to go, this could come in handy. Please feel free to modify the language to make it more user friendly for your students, or to add graphics, etc. as you wish.
Here it is:
Remember, if you're a Quebec teacher using "The Black Binder" as we refer to it here in the ETSB, then you can use the table of contents at the beginning to see if a question is an "A" application question or "V" validation question and practice accordingly.