ISTE offers a great list of educational twitter chats and hashtags. These hashtags and chats can be found by grade level and include descriptions and chat dates/times. ISTE also offers a list of related articles.
This website is great because it is a complete step-by-step guide about twitter chats. This website gives instruction on joining and/or hosting a twitter chat. In addition to this instruction, the website offers information on separate twitter sites.
The Journal is a great teacher resource for twitter chats. The page offers step-by-step instruction on using a twitter chat, as well as great hashtags for educators.
The Edublogger is a great blog to help new users of twitter access twitter chats. The blog is very user-friendly and lists a number of educational hashtags and twitter chats to join.
This website offers the times of the week when teachers can join in on twitter chats that are relevant to the teachers specific grade or subject they teach.
This is the twitter chat schedule for you to take a look at. Go to this website and click on "Official Twitter Educational Chat Schedule" for the schedule.
For future reference: How to conduct a SUCCESSFUL Twitterchat. In case you forget or need a little more convincing on why a Twitterchat is a good tool for you and your students.
Twitter chat specifically for Gifted and Talented. There are many resources available here as well as they answer really important questions. Also, shout out to @gtchat because they talk to Toby on twitter.
Skype allows you to have face to face conversations with multiple people around the world. If you are a very busy person this PLN allows on the go people to chat with big name people at anytime.
This website is similar to google docs, it's real time collaboration with members of a group (students and teachers) where they can write posts, submit files, draw on a whiteboard, and use a calendar feature. It also has a chat feature and is free
"Tackk is a place connect with friends, be creative and have fun conversations."
Based on what I learned from my short time of playing on Tackk's website, I have found it to be an interesting way to allow students to be engaged in their learning. One big use that comes to mind for me would be an online study guide. In history courses this could be particularly useful. You can add videos, maps, images, text, etc that the students can look over and review at their own pace.