The Bonding Song: Chemistry meets song and dance. The core content is present here and packaged in an appealing way, plus here is a way for students to imitate this method to write and perform their own lessons.
Science chemistry resources My High School Chemistry Cheat Sheet 4 years later and I still use this, it has been good to me. Not sure how or if I should credit this, it was just a hand-out my teacher gave us all at the beginning.
112 Cartoon Elements Make Learning The Periodic Table Fun. These are awesome, incredibly creative. The art is crisp and stunning. This should be in print and a staple of any science classroom! <-- That would have made Chemistry so much fun and easier