The highest performing PISA schools, he added, all have “ownership” cultures — a high degree of professional autonomy for teachers in the classrooms, where teachers get to participate in shaping standards and curriculum and have ample time for continuous professional development. So teaching is not treated as an industry where teachers just spew out and implement the ideas of others, but rather is “a profession where teachers have ownership of their practice and standards, and hold each other accountable,” said Schleiche