WolframAlpha - http://www.wolframalpha.com/ – describes itslef as ” the world’s first and only computational knowledge engine.” Enter in a location and learn the population, elevation, unemployment rate, etc for the area. Enter in a math problem and see the solutions appear. The help page give examples of searches to try. This is also available as an ap for iPhones and Androids, so download the ap on the school iPod Touch for a good resource for students.
While we are on the subject of apps…
Top 50 Free Education Apps: http://www.appstoreapps.com/top-50-free-education-apps/ – pulled from iTunes – this site lists the best/most popular free apps for education. Some seem a little more gamey than educational, but the list is worth a look.
Droid does Education - http://www.iste.org/connect/iste-connects/blog-detail/10-03-24/Droid_Does_Education_Android_Applications_for_Teachers_and_Learners.aspx – ISTE compiled a list of the best android apps for education.
Free Education Apps for Android OS - http://www.mguhlin.org/2010/07/free-education-apps-for-android-os.html – this list is broken into grade levels.