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Good screenshots for how to use "Preview" more effectively

"Here is a collection of some very good add-ons to use on Google Drive to edit  and share PDFs. Some of the things you can do with these tools include: merge several documents into a single PDF, split or extract pages into one PDF, convert PDFs to images, compress and reduce the size of your PDFs and many more. All of these add-ons are web based and do not require any software installation. You simply add the Chrome extension to your browser and start experimenting with it right away. Give them a try and see what works for you. Enjoy."

Add-ons listed by category. Nice chart!

Cool ideas to use memes in class

another list of web based platforms for both online museums and virtual field sites that can be used with students in class

These are basically channels where you can have access to a wide variety of math videos and tutorials to help your students with Math.

The Bad Maths Flickr group contains lots of examples of bad math spotted in stores and other public places.

Many things about Blogger make it a popular choice for middle school and high school classroom blogs. It's easy to create a blog on Blogger, all back end maintenance is done for you by Google, and if your school uses Google Apps for Education it can be added to the list of services your students can access with their Google Apps for Education accounts. There is one thing that can't be done easily and that is moderate students' posts (not comments, posts) before they go live on your classroom blog. But if you have students post via email then you can moderate the posts before they go live.