"Scratch paper" is a piece of paper used for rough work, notes, or calculations. It is not meant to be the final product, but rather a temporary surface to quickly jot down ideas or solve problems. Full definition
When you walk into the exam you should be prepared to quickly recreate the basic outline on a piece of scratch paper. (lawyerist.com)
There are bigger boxes so your students can show their work or you can have them work on scratch paper and use the answer sheet that provides smaller boxes for just the answers. (tes.com)
You may want to provide scratch paper for students to show work and space for their thinking. (tes.com)