Yesterday Tullen had her last day as an employee at Hovin School of Youths in Oslo. At the retirement party she received the above sculpture as recognition of an outstanding performance in pedagogical skill during many years. Her students called her M & M (Mode and Math) some years ago, and her colleagues fully acknowledged her competence in conveying the key code of Mathematics to students. They chose a great symbolic farewell gift.
Congratulation and welcome to the world of retired persons.