I have recreated a free poster for display in the classroom.
I smile each and every time I read it, and I'm hopeful that other teachers will appreciate the poster as an addition to the classroom displays!
The poster is intended to remind students that there are NO shortcuts to math computations; there are NO steps that they should skip.
I feel that it is also "friendly" in the way it reminds the students to follow procedure, yet it saves the teacher from having to repeat, repeat, repeat.
Thanks, and happy teaching!