This is the website I first used when I learned about UbD a couple years ago, as I was a bit confused after class. It does a great job of explaining things in layman's terms, and even non-educational lingo for other majors. Great to utilize when explaining, identifying, or attempting to identify UbD.
This is the link to the National Assn. for Sport and Physical Education. Unfortunately, all that is listed here are the larger principles. You can purchase the full standards book.
This is a website that allows you to create worksheets for students. There are a variety of styles (word finds, learn-to-read books, puzzles, etc). It is primarily designed for younger students (K to 8 or so), but can be used for any grade. I use it to create sponge activities that reinforce the content of the lesson plan.
This is a great site for educators! There's a whole section on puzzle making, lesson plans, unit ideas, themes, worksheets, and more! Definitely check it out!
This is a great website, with lots and lots of links to fantastic educational websites all around the world wide web. You click on a topic, and it provides a list of websites that have information about that topic.
I like this website because it has educational games for kids to play. I think its important for children to know how to use computers, and learning through an online game can be a fun effective way to do this.
This website provides various games for younger elementary students. It has math games related to the seasons and contains math related puzzles as well.