Scenarios for Graph Algorithmic Thinking Co-created with Teachers.

This paper revolves around graph algorithmic thinking, related to graphs and their properties. Algorithms for graphs are used to investigate problems young learners are familiar with, such as how information is spread in a social network. However, graph algorithmic thinking is not taught at school. School teachers, besides learners, are often unfamiliar with it. This paper stems from research for introducing teachers to graph algorithmic thinking. Research in the field highlighted the importance of creating learning scenarios with teachers so as to bring graph algorithmic thinking into schools and promote learning. This paper explains how learning scenarios were created with secondary-school teachers and how they were used to structure interventions without computers in a secondary school. Learning results are satisfactory and they are reflected over in the conclusions to promote further scenario-based interventions for graph algorithmic thinking.