Flashcards are sets of cards used for classroom drills that have questions on one side and answers on the other to aid in memorization. Manila paper is a less refined, inexpensive paper often used for reporting that has better printing qualities than kraft paper but is not as strong. A chalkboard or blackboard is a reusable writing surface made of calcium compounds like chalk that was originally slate stone and is now often green for eye comfort, used to write text or drawings.