René Kneyber (Author)
René Kneyber (1978) is a former mathematics teacher with a significant impact on the educational landscape in the Netherlands. With a passion for education, Kneyber dedicated himself to not only imparting mathematical knowledge to his students but also to influencing educational policy and practices on a broader scale. His expertise and commitment to improving education led to his appointment as a crown member of the Onderwijsraad (Education Council) in the Netherlands, a prestigious position he held for eight years.
Kneyber is also known for his contributions to the public discourse on education through articles, books, and participation in educational debates. He advocates for a balanced approach to education, emphasizing the importance of rigorous academic standards while also recognizing the need for innovative teaching methods that cater to diverse student needs.

Valentina Devid (Author)
Valentina initially embarked on her career as a history and philosophy teacher in secondary education. Over the years, she held diverse roles within secondary education, accumulating a lot of experiences. In higher education, she served as an assessment expert at an applied university's teacher training program.
Valentina's journey into formative action began with the master's program 'Learning and Innovation,' eventually becoming her area of expertise. Collaborating with René Kneyber and Dominique Sluijsmans, she co-authored a book on formative action and curriculum design. Together, they founded the highly successful teacher training organization 'Toetsrevolutie' or 'Formative Action School.' Their impactful work has led to the successful implementation of formative action and feedback processes in secondary education, and they now share their expertise to assist organizations across the Netherlands.
As an educational consultant, Valentina travels extensively throughout the country, delivering engaging keynotes, workshops, and training sessions for teachers.

Blanca Wilde López (Author)
Blanca Wilde López is a former Spanish and English teacher with over twenty years of experience in primary, secondary and vocational education. She has also worked coaching teachers and helping schools with implementation programmes. She is currently a trainer and consultant for Toetsrevolutie and as a school leader in secondary education.