„The better a teacher understands a topic in math, or a type of poetry, the more ways he can approach it; and the more ways he can approach it, the easier it is to find a way that is comprehensible to someone who finds the standard approach unhelpful.“
Univ.-Prof. Charles Sabel u.a., „Individualized Service Provision in the New Welfare State – Lessons from Special Education in Finland“ (2011), S. 58f