Differentiation is an approach to education in which every student's individuality and special needs are taken into account. Practical and accessible, HOW TO SUCCEED IN DIFFERENTIATION reveals the approach taken in the high-achieving Finnish education system, where the national curriculum obligates all teachers to differentiate their teaching from the get-go. The book is divided into four parts. Part I explains the background of Finnish education and differentiation in the Finnish context. Part II investigates the theoretical basis for differentiation and strives to offer new perspectives for the most common challenges of differentiation. In addition, Part II introduces the reader to the imaginary example students, whose problems are attempted to be solved later in the book. In Part III, differentiation is approached through the five-dimensional model of differentiation, which the authors have created and which, in their opinion, covers the most central areas of teaching, in which differentiation should be acknowledged. In Part IV, differentiation is exemplified in language and literature, mathematics and foreign languages.