The Importance of Continuing Learning

A green traffic light would be, I've heard this term before, osmosis. An amber one would be never heard of a nephron or whatever and I'm going to say that I don't have a clue. And obviously they're the key ones because they're ones that they may have been talked before but hadn't actually learned. It's also useful in another way and that it shows the students that everything they do builds on something else that they've already done.