We report from a project aiming at stimulating primary and secondary teachers to work with open-ended activities, and using accounts-of to develop their awareness of the results of these activities. Results show that accounts-of seem to have a good potential of developing teachers’ awareness of student reasoning and thinking, i.e. giving them a better stance for following the learning of the students, and that open-ended tasks seem to have a great potential for a better inclusive mathematics teaching by not demanding special tasks or special instructions for certain students or smaller groups of students.