Abstract: A tool is usable as an educational tool, a diagnostic tool or a toy and is designed to develop or diagnose a user's matching, classifying, or labeling skills using primarily visual feedback and manual manipulation--skills possessed by even non-verbal students. The tool comprises one or more boards each of which may be handheld or may include devices for mounting the board on a wall, table, or another support. Each board is also constructed of a durable and preferably rigid material permitting significant rough handling by the user. Each board is composed of at least one panel, and typically two or more panels each of which presents at least one work area having a target and a pocket mounted thereon. The user's matching or classifying skills are ascertained and/or developed by inserting cards in pockets bearing characters matching those borne by the associated targets. The boards may be foldable or combinable so as to vary the number of targets involved in the matching, classifying, or labeling task.