All secondary schools, like teacher training, face the human rights-based task of evolving into inclusive educational institutions. The three versions of the Index for Inclusion provide support in this process. This volume outlines how they can utilize it and the steps they can take with it. Building on the previous volume that focused on experiences in daycare centers and primary schools, this volume offers a range of practical reports that provide inspiration for those on the path to greater inclusion, even under the current, rather challenging conditions. These reports are framed by an analysis of the fundamental challenges of inclusive education and the ongoing struggle for inclusion and its implementation.