The RAD description of the Ministry of Education fonds lists the various ministers since 1905: http://hermis.alberta.ca/paa/Details.aspx?ObjectID=GR0011&dv=True&deptID=1

Ministers of Education:
Alexander C. Rutherford (1905-1910)
Charles R. Mitchell (1910-1912)
John R. Boyle (1912-1918)
George P. Smith (1918-1921)
Perren E. Baker (1921-1935)
William Aberhart (1935-1943)
Solon E. Low (1943-1944)
R. Earl Ansley (1944-1948)
Ivan Casey (1948-1952)
Anders O. Aalborg (1952-1964)
Randolph H. McKinnon (1964-1967)
Raymond Reierson (1967-1968)
Robert C. Clark (1968-1971)
Louis D. Hyndman (1971-1975)
Julian G.J. Koziak (1975-1979)
David T. King (1979-1986)
Patrick N. Webber (1986)
Nancy J. Betkowski (1986-1988)
James F. Dinning (1988-1992)
Halvar C. Jonson (1992-1996)
Gary G. Mar (1996-1999)