Torrey Trust is a PhD student in Education at UC Santa Barbara and has put together a great collection of free education technology resources for K-12 teachers. It is available at edutechdatabase.wikispaces.com. There's definitely something there that you can use in your classroom; check it out!
(P.S. Torrey's dad, Jerry, taught Biology and Environmental Science at San Dieguito and LCC before retiring in 2011. Torrey graduated from LCC in 2003.)