"The most important rule to master mathematics is: if you get lost (and most people including “experts” get lost a lot), back up to what you know and start over. Don’t try to keep going; in most cases, you will only get more lost."
http://math-blog.com/2014/03/17/how-to-learn-math/

"Het frontale lesgeven waarbij de leerling na de instructie keurig het enig juiste antwoord reproduceert, is toch echt wel op zijn retour."
http://wij-leren.nl/onderwijs-idealisten.php