The year 1964 saw numerous changes to Midwest Prep Conference membership with a net loss of two members. Milwaukee Country Day School and Milwaukee University School (along with the all-girls Milwaukee-Downer Seminary) merged to form the University School of Milwaukee. The new school took over both MCDS’'s campus in Whitefish Bay and MUS's River Hills campus, along with both predecessor schools' conference membership.[7] The Midwest Prep also lost Lake Forest Academy and Wayland Academy, becoming a Wisconsin-only conference in the process.[8] The entry of Concordia College Prep in Milwaukee to the conference brought its membership roster to six members. St. John's Military Academy in Delafield applied for membership along with Concordia but was rejected because of scheduling issues.[9]Fox Valley Lutheran High School in Appleton joined the Midwest Prep Conference in 1965[10] accompanied with Wayland Academy's return to the circuit,[11] bringing the total number of members back up to eight schools. In 1968, seven of the eight member schools of the Midwest Prep Conference joined the Wisconsin Independent Schools Athletic Association, an organization for interscholastic athletics composed entirely of parochial and private schools.[12] Northwestern Prep was the only holdout, not joining WISAA until 1974.[13]
^ a b c d e f"Prep Conference for Wisconsin is Formed". Green Bay Press-Gazette. April 9, 1940. p. 13. Retrieved January 6, 2025.
^ a b"Wayland Places Two Players on All Prep Eleven". Beaver Dam Daily Citizen. November 26, 1945. p. 8. Retrieved January 6, 2025.
^ a b c"Lutheran High Crusaders Join Wisconsin Conference". Racine Journal Times. March 31, 1950. p. 15. Retrieved January 6, 2025.
^ a b cBrehm, Keith (March 10, 1952). "Lutheran 3d; New Prep Loop Set". Racine Journal Times. p. 11. Retrieved January 6, 2025.
^ a bTrower, Ralph (September 11, 1954). "Lutheran High Faces Grid Rebuilding Task". Racine Journal Times. p. 12. Retrieved January 6, 2025.
^ a b c dTrower, Ralph (November 30, 1955). "NW Prep, Wayland, MCD Loom Strong in Midwest Prep". Racine Journal Times. p. 35. Retrieved January 6, 2025.
^ a b c d"3 Milwaukee Prep Schools to Merge". Appleton Post-Crescent. September 8, 1963. p. 2. Retrieved January 6, 2025.
^ a b c"Lake Forest, Wayland Quit Midwest Prep". Racine Journal Times. November 15, 1963. p. 17. Retrieved January 6, 2025.
^ a bUPI (January 18, 1964). "Concordia in Midwest Conference". Beaver Dam Daily Citizen. p. 5. Retrieved January 6, 2025.
^ a bUPI (January 23, 1965). "Fox Valley Lutheran Joins Midwest Prep Athletic Conference". Sheboygan Press. p. 18. Retrieved January 6, 2025.
^ a b"Wayland Is Returning To Midwest Prep Conference". Beaver Dam Daily Citizen. January 28, 1965. p. 6. Retrieved January 6, 2025.
^AP (June 30, 1968). "54 Independent And Parochials Form New WISAA". Green Bay Press-Gazette. p. 30. Retrieved January 9, 2025.
^"Northwestern Prep Admitted to WISAA". Wisconsin State Journal. May 19, 1974. p. 23. Retrieved February 18, 2025.
^ a bWitt, Ron (October 9, 1970). "FVL, Martin Luther Football Teams to Clash Here Saturday". Appleton Post-Crescent. p. 17. Retrieved January 6, 2025.
^ a bFinneman, John (September 30, 1969). "Prep Spotlight". Racine Journal Times. p. 16. Retrieved January 6, 2025.
^ a b"Concordia University". Encyclopedia of Milwaukee. 2016. Retrieved January 6, 2025.
^ a b"Catholic Loop Retains Cadets, Admits Foxes". Green Bay Press-Gazette. November 3, 1970. p. 13. Retrieved January 6, 2025.
^ a b"St. Mary's in League". Racine Journal Times. November 10, 1970. p. 11. Retrieved January 6, 2024.
^ a bAnderson, John (December 19, 1973). "Catholic Conference Changes Name, Adds Milwaukee Lutheran". Racine Journal Times. p. 1. Retrieved January 6, 2025.
^ a b"To Join Little Ten". Waukesha County Freeman. September 24, 1973. p. 13. Retrieved January 6, 2025.
^ a b"Classic League Nice for St. John's Cagers While It Lasted: Kaufmann". Waukesha County Freeman. March 22, 1974. p. 8. Retrieved January 6, 2025.
^"Vikes experience scheduling problems". Fond du Lac Reporter. August 23, 1981. pp. C-9. Retrieved July 18, 2025.
^ a b c d e f g h"Private school leagues merge". Kenosha News. November 30, 1982. p. 20. Retrieved January 6, 2025.
^"Scoreboard (see Cross Country, WISAA)". Racine Journal Times. November 2, 1975. pp. 2D. Retrieved January 6, 2025.
^"Wayland Harriers 8th in State Meet". Beaver Dam Daily Citizen. November 1, 1976. p. 12. Retrieved January 6, 2025.
^"Aquinas harriers win state title". La Crosse Tribune. October 30, 1977. p. 27. Retrieved January 6, 2025.
^"Roncalli boys second, girls fourth in WISAA cross country meets". Manitowoc Herald-Times-Reporter. October 31, 1982. p. 6. Retrieved January 6, 2025.
^Lindstrom, Don (November 7, 1976). "Burlington St. Mary's ends Apostles' title bid". Wisconsin State Journal. p. 30. Retrieved January 6, 2025.
^Hoffmann, Gregg (November 6, 1977). "Happy Birthday Tom Aldrich!". Racine Journal Times. p. 37. Retrieved January 6, 2025.
^UPI (November 6, 1978). "Burlington takes crown". Kenosha News. p. 23. Retrieved January 6, 2025.
^"Northwestern Prep takes WISAA Class B title easily". Wisconsin State Journal. November 8, 1980. p. 14. Retrieved January 6, 2025.
^Armstrong, Jim (November 8, 1981). "St. Mary's reaches 'top of the hill'". Racine Journal Times. p. 25. Retrieved January 6, 2025.
^UPI (November 3, 1975). "Soccer Winner". Beaver Dam Daily Citizen. p. 15. Retrieved January 6, 2025.
^"Aquinas Girls Place 7th in WISAA State Tennis". La Crosse Tribune. October 11, 1976. p. 11. Retrieved January 6, 2025.
^"Aquinas girls fourth in WISAA state tennis". La Crosse Tribune. October 9, 1977. p. 28. Retrieved January 6, 2025.
^"WISAA girls tennis finishes in title tie". Wisconsin State Journal. October 8, 1978. p. 25. Retrieved January 6, 2025.
^"University School takes net crown". Appleton Post-Crescent. October 10, 1982. p. 49. Retrieved January 6, 2025.
^Pufall, Dick (March 10, 1975). "Crusaders overcome a legend, win B". Racine Journal Times. p. 11. Retrieved January 6, 2025.
^"Baylon, Heiling Honored". Beaver Dam Daily Citizen. March 9, 1979. p. 12. Retrieved January 6, 2025.
^"Milwaukee Lutheran WISAA Golf Champion". Racine Journal Times. May 24, 1969. p. 10. Retrieved January 7, 2025.
^UPI (May 25, 1969). "MUS Snares First WISAA Tennis Title". Green Bay Press-Gazette. p. 40. Retrieved January 7, 2025.
^"Zmolek Edged in Finals". Oshkosh Northwestern. May 24, 1971. p. 22. Retrieved January 7, 2025.
^AP (May 21, 1972). "University School Is Tennis Champ". Wisconsin State Journal. p. 26. Retrieved January 7, 2025.
^AP (May 21, 1973). "University School Wins Net Crown". Sheboygan Press. p. 25. Retrieved January 7, 2025.
^AP (May 19, 1974). "MUS Takes Fourth Straight WISAA Net Championship". Green Bay Press-Gazette. p. 46. Retrieved January 7, 2025.
^"University School Cops WISAA Tennis Tourney". La Crosse Tribune. May 18, 1975. p. 30. Retrieved January 7, 2025.
^"Wildcats win tennis crown". Appleton Post-Crescent. May 23, 1976. p. 43. Retrieved January 7, 2025.
^AP (May 21, 1978). "Milw. University School wins WISAA tennis crown". La Crosse Tribune. p. 33. Retrieved January 7, 2025.
^AP (May 20, 1979). "University School wins WISAA tennis crown". Wisconsin State Journal. p. 28. Retrieved January 7, 2025.
^"University School wins title". Oshkosh Northwestern. May 27, 1980. p. 5. Retrieved January 7, 2025.
^UPI (May 26, 1969). "Wayland Wins in WISAA Class "C" Track Tourney". Beaver Dam Daily Citizen. p. 4. Retrieved January 7, 2025.
^"Pius Wins WISAA Track Title". La Crosse Tribune. May 24, 1970. p. 17. Retrieved January 7, 2025.
^"Janssen and Van Groll Pace Chuters to 2nd in State Class C". Appleton Post-Crescent. May 23, 1971. p. 42. Retrieved January 7, 2025.
^"Angels 4th in WISAA Track". Racine Journal Times. May 21, 1972. p. 15. Retrieved January 7, 2025.
^"Redmen Earn 6th in Class C Track". Beaver Dam Daily Citizen. May 27, 1975. p. 4. Retrieved January 7, 2025.
^"University School, Kliefgen Sparkle". Green Bay Press-Gazette. May 23, 1976. p. 39. Retrieved January 7, 2025.
^"Apostles trackmen fourth with three individual titles". Wisconsin State Journal. May 22, 1977. p. 34. Retrieved January 7, 2025.
^"Vondra wins two titles at state WISAA track meet". Wisconsin State Journal. May 21, 1978. p. 32. Retrieved January 7, 2025.
^"WISAA Boys C". Fond du Lac Reporter. May 20, 1979. p. 11. Retrieved January 7, 2025.
^"Holy Name places fourth in WISAA track". Wisconsin State Journal. May 25, 1980. p. 24. Retrieved January 7, 2025.
^"Crusaders 3rd". Fond du Lac Reporter. May 24, 1981. p. 15. Retrieved January 7, 2025.
^"Lancers place fourth, sixth in WISAA state track meet". Manitowoc Herald-Times-Reporter. May 30, 1982. p. 5. Retrieved January 7, 2025.
^AP (May 22, 1983). "Goldman wins Class C discus". Wisconsin State Journal. p. 64. Retrieved January 7, 2025.
^Lucas, Mike (May 31, 1972). "A.M. Report (Mack's Carol Joas sets mark)". Chippewa Herald-Telegram. p. 16.
^"St. John girls take 4th in WISAA track test". Appleton Post-Crescent. May 21, 1973. p. 22. Retrieved January 7, 2025.