An improved system, method, service method, and data structure that facilitates collaboration with, communication of, and access to information, particularly in an education environment is disclosed. The invention includes a database having one or more records. Each record defines a logical connection between one or more querents and one or more respondents. Each logical connection has a strength value indicating the value of the logical connection. Some embodiments of the invention include a selecting process that selects one or more of the respondents to respond to one or more queries from a querent. Alternative embodiments of the invention include processes that mine the database and/or provide services to users.