1946
Born to Paul Heil and Alice Mary (Harty) Althoen in Dayton, OH.
1966
Marries Marcia Ann Warrick.
1969
Earns a Bachelor of Arts from Kenyon College.
1972
His son, Michael David, is born.
1973
Obtains a Doctor of Philosophy in mathematics from the Graduate Center of the City University of New York.
1973
Is an assistant professor at Hofstra University in Hempstead, NY until 1975.
1974
His daughter, Tosca Ann, is born.
1975
Is an assistant professor at the University of Michigan-Flint until 1980.
1976
Co-authors “Matrix Methods in Finite Mathematics.”
1978
Co-authors “Finite Mathematics.”
1980
Is an associate professor at the University of Michigan-Flint until 1985.
1985
Co-authors “College Algebra via the Theory of Equations.”
1985
Is chairman of the Mathematics Department at the University of Michigan-Flint until 1989.
1985
Is a professor of mathematics at the University of Michigan-Flint until 2007.
1988
Co-authors “Introduction to Discrete Mathematics.”
1990
Receives a Faculty Achievement Award from the University of Michigan-Flint.
1994
Co-authors “Statistics, Concepts and Applications.”
2007
Is a professor of mathematics education at the University of Michigan-Flint until 2010.
2010
Is named professor emeritus in mathematics education at the University of Michigan-Flint.