Intel offers free, easily integrated tools and teaching resources to support collaborative student-centered learning. Our online thinking tools provide active learning places where students can engage in robust discussions, analyze complex information, pursue investigations, and solve problems. You'll also find teaching resources such as exemplary lesson plans, assessment strategies, and technology-enriched project ideas for all K-12 subjects. Developed by educators, these free tools and resources support 21st century learning, with project-based approaches in the classroom."
"existing members of Skype in the classroom or new registrants can use Skype's Group Video Calling free of charge.
A feature previously available only to paid Skype Premium subscribers, "