The school board in Jurgensen's district has been supportive but doesn't have the funds for his out-of-state trips, he said. Instead, students raise money for the trips.
Jurgensen, an Iowa native, said he discovered Milton Howard "by accident" while his students were researching another former slave.
"Davenport seemed to be the place African-Americans felt safe enough to settle after civil rights," he said.
Information from: Quad-City Times, http://www.qctimes.com