This document discusses professional learning networks (PLNs) and communities (PLCs). It provides an overview of the basic stages of participating in a PLN: consumption, connection, creation, and contribution. It also lists some common building blocks of PLNs, such as webinars, blogs, social networks, and provides a starter kit resource. Professional learning communities are defined as a group of educators who continuously work to improve student learning through inquiry and applying what they learn. Critical Friends Groups are meant to create a professional learning community, make teaching practice public, help collaborative work, and ultimately improve teaching and learning.