Take the old baking soda and vinegar volcano to the next level by using it to study repeated lava flows over time, examine geologic features on Earth and Mars, and speculate about some of the formations on Mars. 

Here is one of the better lessons I've come across on how to teach fractions and decimals. This lesson does a great job of showing how these two mathematical representations of numbers are interrelated. Some excellent websites, printable...

Secondary carpenters apply their skills to improve display spaces in classrooms at their campus. Includes a contract between workers and teachers who sign on for improvements in the their rooms. Concurrent exploration of building and...