Originally Posted by Pattycakes
If you can't find a add a quarter inch ruler, go to the class and for that class barrow a ruler, ask the teacher where to get the ruler and then purchase it by the next class.
I hope you don't mean borrow from someone in the class. Although I don't mind sharing something that's only used once or twice, sharing an often used tool during a class can be annoying and isn't fair to the owner.
I would suggest either purchasing the tool or finding a substitute or just doing without.