I am a big fan of Prensky's works and I believe that most people who are interested in the connection between technology and education will find his writings insightful. I highly recommend his most popular piece, "Digital Natives, Digital Immigrants.
Remake Your Space for Innovation: 8 Tips and Tricks to Redesign Your Classroom : Educator Innovator Network
Avery Labels for Conference Notes
Labels for guided reading and writing conference notes
Grammar in Real Life – Catch Proofreading Mistakes in Fun Visual Activity
Daily Schedule Display~ Slide the "window" to expose each day's schedule. Easy and great for reinforcing chart-reading skills!
Great roundup of pirate-themed activities for Talk Like a Pirate Day.
Virtual Field Trips: Using the Internet to Transport Kids Around the World
Virtual field trips is a great idea to explore the world without leaving the classroom! Using the Web to Take Virtual Field Trips Around the World! Love the live webcams.
Students love these interactive graphic organizers and so do I. They encourage student ownership of study material, provide a kinesthetic component to teaching strategies, and promote long-term retention of academic lessons.
Organizing Classroom Learning Centers Basic ideas would work for secondary classes as well.