1. A learning support method with a server computer that holds a plurality of learning material units and keyword information including keywords linked with said learning material units in a memory portion, said server computer being able to connect with a client computer of a learner, said method comprising: a keyword set specifying step for specifying keywords linked with the current learning material unit that is attended by said learner as a first keyword set and for specifying keywords linked with one of the learning material units that are already attended by said learner as a second keyword set when said client computer informs that a learner can not understand said current learning material unit; a selectable keyword set extracting step for extracting keywords that are common between said first and second keyword sets as a selectable keyword set; and a keyword list transmitting step for transmitting a list of keywords within said selectable keyword set to said client computer.