PROVIDING ON-LINE ELECTRONIC BULLETIN BOARDS VIA A GLOBAL COMPUTER NETWORK FOR TRANSMISSION OF MESSAGES AMONG COMPUTER USERS CONCERNING EDUCATIONAL COURSE MANAGEMENT, NAMELY SYLLABUSES, HOMEWORK ASSIGNMENTS, CHAT SESSIONS, BULLETIN BOARD QUESTIONS, QUIZZES AND TESTS THAT AUTOMATICALLY GRADE, LAB NOTES, LECTURE NOTES AND OTHER SIMULATIONS FOR STUDENTS, AND GRADE BOOK TOOLS AND GRADE BOOKS