“…Teachers who differentiate their instruction aim to proactively take their students' individual learning needs into account in the process, product, and content of their teaching (Tomlinson et al 2003, De Neve et al 2015, Deunk et al 2015. Much research has already been done into the effectiveness of DI on student learning (e.g., Deunk et al 2015), teachers' perceptions and practices of DI (e.g., Brighton 2003), and how they can incorporate it into their practice (e.g., Tomlinson et al 2008). DI appears to be beneficial for students' achievement, motivation, and engagement (Graham et al 2008, Deunk et al 2015, but many problems have been described in the literature regarding the incorporation of DI into practice (Tomlinson et al 2003, Hertberg-Davis and Brighton 2006, Smit and Humpert 2012, Janssen et al 2016.…”