Various teaching strategies raise the quality of the class. Learning teaching strategies from instances of classes is useful method. However, it is difficult to learn teaching strategies from instances because instances do not describe the design rationale of themselves. This study propose a learning method to reconstruct the design rationale of instances of classes. OMNIBUS ontology can be a framework to describe the design rationale and Kit-build method can be a framework for learning by reconstruction. This paper reports the design and the development of a practice system for reconstruction of design rationale in lesson plans
