Please document those many school shootings in the 1980s?
Most of the school massacres that I've found documented took place between 1996 and 1998.
Stamps High School, Stamps, Arkansas Monday, January 7, 1980
Langdon Elementary School, Washington, D.C. Friday, February 1, 1980 (labeled an accident)
Eastern High School, Washington, D.C. Thursday, March 13, 1980
Lincoln Junior High School, Washington, D.C. Tuesday, April 29, 1980
Spingarn High School, Washington, D.C. Wednesday, September 10, 1980
Valley High School, Las Vegas, Nevada Friday, March 19, 1982
Garland County Community College, Hot Springs, Arkansas Tuesday, April 6, 1982
Parkway South Junior High School, St. Louis, Missouri Thursday, January 20, 1983
Brentwood East Junior High School, New York City, New York Monday, May 16, 1983
Crawfordsville High School, Crawfordsville, Indiana Friday, December 2, 1983
Father Duenas Memorial (High) School, Mangilao, Guam Wednesday, January 14, 1984
Forty-ninth Street Elementary School, Los Angeles, California Friday, February 24, 1984
Richland High School, North Richland Hills, Texas Friday, September 28, 1984 (alumni not student)
California State University - Fullerton, Fullerton, California Saturday, October 13, 1984
Goddard Junior High School, Goddard, Kansas Monday, January 21, 1985
Langham Creek High School, Cypress, Texas Friday, September 20, 1985
Spanaway Junior High School, Spanaway, Washington Tuesday, November 26, 1985
Portland Junior High School, Portland, Connecticut Tuesday, December 10, 1985
Pine Forest Senior High School, Fayetteville, North Carolina Friday, May 6, 1986 (hostage situation by adults)
Fergus High School, Lewistown, Montana Thursday, December 4, 1986
Cokeville Elementary School, Cokeville, Wyoming Monday, May 16, 1986
DeKalb High School, DeKalb, Missouri Monday, March 2, 1987
Pinellas Park High School, Pinellas Park, Florida Thursday, February 11, 1988
Hubbard Woods Elementary School, Winnetka, Illinois Friday, May 20, 1988 (arson and shooting)
Mascotte Elementary School, Mascotte, Florida Monday, October 3, 1988
Atlantic Shores Christian (High) School, Virginia Beach, Virginia Friday, December 16, 1988
Cleveland Elementary School, Stockton, California (adult shooter)
I got tired, but there are more.