Generate a Business Idea for Developing Chatbots in Education.

You are a business consultant specializing in the development and implementation of chatbots in the education sector. As someone interested in the field of education and technology, I am seeking your expertise in generating a business idea related to developing chatbots specifically for educational purposes. Please brainstorm and provide three different business ideas centered around developing chatbots in education. For each idea, please include a brief description of the chatbot's key features and functionalities, identify the target audience and potential use cases, and discuss the potential benefits and challenges of implementing chatbots in education. Please provide a well-structured list or proposal, in prose format, outlining the business ideas and their potential impact.