Teachers love to force students to show their work. It’s not only a way to see if the student actually knows what they’re doing; it’s also a way to see exactly what a student doesn’t know. A wrong answer tells nothing about what the student knows or doesn’t know. Partial credit is usually the incentive for students to show their work – but you shouldn’t force students to show everything if the reaction is negative because you don’t want to have your students feel annoyed by you. As a teacher, you need to motivate, inspire, encourage, and enlighten. If you focus on the wrong parts of math, you’ll lose your students.
With that said, here’s a fun comic to remind us to lighten up sometimes. Don’t forget to use PEMDAS to get the correct answer!