From site: Welcome to ChemEd DL! Here you will find exemplary digital resources, tools, and online services—your 24:7 aid for teaching and learning chemistry. A collaborative, community-driven effort, ChemEd DL is the place for sharing your work and benefitting from what others have done.

Periodic Table Live! allows you to explore a broad range of information about the elements, their reactions, their properties, their structures, and their histories.

See models of the elements, organic and inorganic compounds. Find teaching resources for high school students. Take an online Moodle chemistry course.

From site:  Ask a High School Chemistry question here. And we’ll get back to you as soon as we see it. Please feel free to answer other people’s questions too.   Read Forum rules before posting.

From site:  A Tutorial for High School Chemistry – The ChemTeam provides study resources in all standard topics for students in high school and Advanced Placement chemistry.

From site: The ChemCollective has a variety of pre-made activities ready for you to use in your class. Activities are one of six types:

• Virtual Lab Problems, which use a flexible simulation of a wet chemistry lab
• Real-World Scenarios, wherein students apply chemistry concepts in a real-world situation
• Concept Tests, brief questions for use during class to see quickly how well students are getting a sense of the material
• Simulations, which can be used for demonstrations, exploratory learning, or homework supplements
• Tutorials, which combine movies and text with interactive problems that serve as worked examples
• Course Modules, a complete course currently offered in stoichiometry, with thermodynamics and and equilbrium coming shortly

From site:  The Chem1 Concept Builder provides guided, interactive, and in-depth instruction in General Chemistry at the college and advanced-high school levels.

Guided: Each lesson focuses on a single concept which is introduced at the simplest possible level and is then extended step by step as you proceed, building on and reinforcing what you have already learned.

Interactive: No clunky Web-based interface. You are an active participant in a conversation that provides instantaneous feedback about your right and wrong answers, and multiple levels of help when you need it.

In-depth: Much more than the usual problem drills and multiple-choice tests; these lessons focus on the fundamental concepts to extend your understanding and to deal confidently with those problems you have not yet seen!

The Chem1 Virtual Textbook:  Well, it’s not really a textbook, but rather a set of chapters covering many of the principal topics that are part of most first-year college-level or AP chemistry courses. They provide somewhat more depth than you will find in conventional textbooks, and will probably be most useful when used to supplement such texts. Many of the chapters contain the same illustrations and problem examples that you will encounter in the Chem1 lessons.