This is an excellent website for finding useful information and tutorials about web applications, environments, and educational resources for teachers and schools. It contains a lot of support for Google applications such as Chrome, Docs, Classroom, etc. What I really like about this site is that it's really straightforward. You can find content quickly and they are all free to download and use. You can even take a Google Classroom certification course for free!
Another great teacher resource website that focuses on ESL. It's got a fairly large database of lesson plans, powerpoint presentations, videos lessons, and more. I really like it how you can preview the content before commiting to download so that way you can save a lot time and of course, everything is free! You do need to register for a free account first before you can download anything but it's quick. Just be sure to give credit to the original authors.
If you're looking for teaching materials and ideas for a wide range of subjects and platforms, then this is the site. Everything is well organized and easy to find. The site is continually updated with education news briefings as well as new content. I found that they have high quality lesson plans that align well many curriculums from across North America. Teachers can also find several readings on professional development or enroll in their online courses (for a fee).
I personally enjoy visiting this site for their EdTech reviews on various applications, educational tools, and videos. Here you can also find resources on professonal development, take part in training webinars, and so on. Take a look around and you'll find a lot of other interesting things they offer.