One amazing PLN for teachers is Pinterest, it has so many different boards for teachers that can show anything from classroom organization tips to fun assignments and even behavioral management ideas. Due to the format of Pinterest it is really easy for a teacher to customize it to meet their own needs, which really makes it personal. You can also form collaborative boards, so like Diigo multiple teachers can add pins to the group of topics that they find helpful to the group as a whole. https://www.pinterest.com/ YouTube can also be very helpful because they have videos to explain almost anything you could think of. Teachers throughout my schooling have always used creative short videos to summarize or visually go into depth on different topics. YouTubers such as CrashCourse are perfect additional information to help students understand certain topics. Also, teachers who are having difficulties with using technology in the classroom can almost always just look up a YouTube video on...