Chemical Education Digital Library has a powerful set of digital tools, resources, and online services for teachers and learners of chemistry. My 3 favorite tools are:

1. Molecules 360– where you can pick a compound and rotate the molecule in space. Great support for learners who may be struggling to visualize.
2. Periodic Table Live– another great Periodic Table interactive- click on an element to find more info, pics, videos, etc.
3. What’s This?– a collection of images and video clips demonstrating interesting chemical reactions with explanations.

Applications for Science Teachers: Another set of tools for high school chemistry teachers (and students) to add to their bookmarks. There are lots of resources here- I recommend taking some time to explore.