PROBLEM TO BE SOLVED: To give a student attending a lesson through a network a feeling of attending the lesson with other students.;SOLUTION: A lesson system comprises a lesson server 10 and a plurality of student terminals 30. Each student terminal 30 has: a detection section 301 which detects input operation to the student terminal in a lesson with lesson data delivered from the lesson server in real time; and a transmission section 302 which transmits detection information, showing detection of the input operation, to the lesson server 10. The lesson server 10 has: a reception section 101 which receives the detection information from the student terminal 30; and a notification section 102 which notifies the student terminals 30 other than the student terminal transmitting the detection information that the input operation is performed.;SELECTED DRAWING: Figure 1;COPYRIGHT: (C)2019,JPO&INPIT
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