I saw some of these math project ideas and thought that they were pretty cool. The only drawback that I found with them is that they don't look like lesson plans, but you can also make them your own.
I came across this website for high school students (or beyond). This website is very interesting if a student is interested in visiting foreign countries. There are many choices for volunteer work.
Social studies. I would say a website for upper elementary. An extention to your teaching for students. Can be integrated through literacy as maybe a project for Cafe work.....
A cool website that helps students find books that are high-interest. It also recommends books at a similar reading level to what they entered as their jumping-off point.