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This unusual application approaches learning in a different way. It's built around personal goals, and simplicity depends upon what the users wants to learn.
First, identify what you want to learn. This is a "learning goal." That's when the network comes in.
Two Brains lets you and others collaborate by sharing resources, thoughts, comments, and ideas. It combines social bookmarking and shared goals to support a learning community. As the network effect is achieved, you'll receive a flow of learning resources that can deliver quality, content-based resources based on your goals.