Recently I came across a very interesting platform for educators called Participate Learning. Participate Learning is a free collection and collaboration platform that lets teachers quickly find, collect and share digital resources. Educators can easily create their own collections from several thousand expert-vetted, standards-aligned resources for hundreds of Pre-K - 12 subject areas. They can also add any URL addressable resources (website, iTunes, YouTube, Dropbox, Evernote, etc.) and upload their own files (lesson plans, pictures, videos, etc.). While building collections, educators can also invite an unlimited number of colleagues and others in their personal learning networks to contribute resources to their collections. The first step is to register for a free account with Participate Learning. You can generate an Embed code for a blog, website or learning management system, and share your collection directly on Facebook, Twitter, or Pinterest. Here is my collection called "Developing 21st century skills through project-based learning."