The only way to learn mathematics is to do mathematics.
Paul Halmos
Most children, even very bright ones, need constant review and practice to truly own a concept in grammar, math, or science. In schools today, on paper it may appear that kids are learning skills, but in reality they are only renting them, soon to forget what they learned over the weekend or summer vacation.
Rafe Esquith
Practice isn’t the thing you do once you’re good. It’s the thing you do that makes you good.
Malcom Gladwell