Cambium is the very thin inner layer of bark. It is composed of undifferentiated cells - like embryonic or stem cells - that can grow into either phloem cells (spongy part of bark) or xylem cells (sapwood). These tiny cells reproduce in response to hormones within the tree and it is these cells that make the tree and branches grow thicker and stronger and give us growth ring.

Cambium Ed is founded on the idea that learning and growth are always happening, and that the learning that we do strengthens us and gives us more resources. When we enter into any learning situation, we never know for sure what growth is going to happen. I hope that the embryonic cells from my courses will help you to develop new rings of growth.