high school

Virtual age-dating is an interactive tool that describes how geologists and archeologists are able to determine the age of samples.  Aimed at high school level and above, but an interested middle school level child could grasp the concepts introduced with help.  Students should be familiar with the concept of ions , percentages and how to read data off a graph to do the exercise.  FWIW, I think the scale of some of the graphs are poorly chosen, and make it difficult to be as precise as the exercise requires; a per

Every month in the school year the Baltimore Museum of Art picks a piece of art in their collection, writes up an art theory lesson for that piece, including an art project, and makes the lesson and a high quality photograph of the piece available for free download.  This is the third school year they've done it, and the archives are freely available.  The art they've chosen is stunning, and the projects tend to be managable at home, assuming you have or are willing to purchase materials when necessary.  The collection includes art from a wide range of locations and time peri

Khan academy is an amazing resource.  It's a HUGE collection of videos, all featuring a smart man with a gift for clearly explaining the complex, carefully going through a wide range of topics, all clearly organized.  There's everything from classic brain teasers, to arithmetic, to high school level math, including calculus and differential equations, to biology chemistry, physics, and economics.  The graphics in the videos are fairly simple, and the tone is very friendly, conversational and often funny. 

A homeschool mom is generously sharing the marine biology course she's developing for her kids.  Alas, the marine biology course isn't for those of us who live far from the ocean, but it's a very cool program for coastal families.