[header] How to remember your new locker combination [title] In each of your notebooks or binders, write down your combination as an addition problem. [step] So if your combination was 17/5/37, you would write it as 17 + 5 + 37. Or, if they are smaller numbers or you're in a higher grade, do something like 17x5x37. 
If somebody saw it in your binder or notebook, they would think you were doing homework! [title] If you have a calendar handy, keep the combo on your birthday. [title] Write down your combination on a piece of paper.