Research in AI tends to focus on developing robots who are more capable and efficient than humans, but a new study at École Polytechnique Federale de Lausanne in Switzerland is doing just the opposite. When children teach their peers they gain motivation and self esteem — and ultimately they improve themselves, all without realizing. The CoWriter Project has created a robot classroom assistant who is less advanced at handwriting than the most struggling students — giving those pupils someone to learn with and teach. Scientists from the Computer-Human Interaction Lab at EPFL used the like-able humanoid NAO robot in their…