Fig. 5

Equipment in the escape room. a The equipment on the central desk included a copy of the escape room rules, the kitchen timer to time the participants (yellow arrow), the four tin containers (white arrow) which were each locked with a three-number combination lock and contained a note for the final crossword puzzle, and clues on how to unlock the briefcase containing the puzzle (dashed white arrow). Photo frames containing images of Roentgen and an early example of a hand radiograph were not part of the escape room puzzles, and only placed on the table for decoration. b All the equipment was easily transportable between teaching sites within a single carry bag