The Michigan Constitution dates from 1908. It's Premable says:
"We, the people of the State of Michigan, grateful to Almighty God for the blessings of freedom, and earnestly desiring to secure these blessings undiminished to ourselves and our posterity, do ordain and establish this constitution"
Then later we find the portion that follows the Northwest Ordinance:
Article VIII - Encouragement of education.
Sec. 1. Religion, morality and knowledge being necessary to good government and the happiness of mankind, schools and the means of education shall forever be encouraged
Read the entire Michigan Constitution