This looks like a great website. It covers around twelve general chemistry topics and includes teacher resources, activities, videos, and labs for students.
This web site provides links to other websites that chemistry teachers can use in the classroom. The site breaks down the recommended websties by category so it's easier to navigate.
Talking Science is a great resource for Teachers Parents and Students. The Teachers section has activities and even lesson plans from all disciplines to use or draw ideas off of.
This site links to chemistry classroom management and activity resources. It also has a lot of fun links that relate chemistry to other subject areas from history to poetry.
This is a great resource that allows teachers or students to make engaging presentations or slideshows. There are also many other applications that can be made on this site, such as an interactive timeline or comics and cartoons.
This website is for middle school teachers and has lesson plans, power points, graphic organizers, and links that could be used by teachers to support the classroom.
This is an Amazing resource for modeling science topics with simulations! Run by the University of Colorado at Boulder, there are tons of interactive simulations including ones I've used in my classes that are very helpful in visualizing certain topics. The website also has shared activities from teachers across the country including lesson plans, homework, demos, and labs for all grade levels!
This site is maintained by a high school biology teacher. It includes notes / study guides, interactive quizzes, online activities, and numerous science links relating to all biology topics.