معرفی
D.L. de Haan is an Assistant Professor at the Freudenthal Institute within Utrecht University’s Faculty of Science, focusing on mathematics education. They also serve as a teacher trainer at NHLStenden Hogeschool in Leeuwarden and Groningen (0.75 FTE) since 2013, following roles in the Philippines (2001-2003) and Hogeschool Utrecht (2003-2012).
- Specializes in enhancing mathematical thinking skills through open assignments like the Maths A-lympiad.
- Conducts research on Learning Study and Variation Theory to improve pre-service teacher training, funded by an NWO doctoral grant (2020).
Active in international development cooperation (Philippines, Ghana, Yemen, Indonesia), designing educational materials and training teachers. Their work bridges theoretical research and practical implementation in secondary mathematics education.
Recent Publications highlight the integration of Variation Theory into Lesson Study frameworks, emphasizing its cross-disciplinary applicability and role in enhancing subject-specific pedagogical knowledge.
Scientific Awards:
- NWO doctoral grant for teachers (2020).
Organized workshops like the Wiskundige Denkactiviteiten course (2014–2017), targeting lower secondary education. Collaborates with institutions globally, including the European Society for Research in Mathematics Education.