This "Take Home Course" is an introduction to collaborative and networked professional development for anyone involved in K-12 education. Collective growth includes PLCs, PLNs, the Commons, Collective Teacher Efficacy, and more. The aphorism “a rising tide lifts all boats” is especially true in the world of professional development. When educators are sharing their best ideas, everyone benefits. This is what we mean by “collective growth.” No matter the scale, each teacher’s work is connected to every other teacher’s work. The ability of a teacher a grade level below or in another department affects your students. These students go on to affect the next generation. It is true, then, that “no teacher is an island.” Click image to download.