DescriptionBlackboard1257.jpg Deutsch: 2 schwarze Tafeln und "Lehrertisch"; Frontalansicht English: 2 blackboards with formulas and calculations about...
File:Formula-on-blackboard758.jpg File:Blackboard-from-side881.jpg File:Two-blackboards1783.jpg File:Blackboard1257.jpg File:Teacher-writing-on-blackboard564.jpg...
File:Formula-on-blackboard758.jpg File:Blackboard-from-side881.jpg File:Two-blackboards1783.jpg File:Blackboard1257.jpg File:Teacher-writing-on-blackboard564.jpg...
File:Formula-on-blackboard758.jpg File:Blackboard-from-side881.jpg File:Two-blackboards1783.jpg File:Blackboard1257.jpg File:Teacher-writing-on-blackboard564.jpg...