4 ms·Pen and paper help, too.by panic 17y agoPen and paper help, too._giu 17y agoagreed. a whiteboard helps, too!eru 17y agoOr a blackboard. I love chalk!MaMa 17y agoThe Feynman Problem-Solving Algorithm: (1) write down the problem; (2) think very hard; (3) write down the answer.