Three years ago they were seniors at Reservoir High School, taking math and history tests, writing English essays, eating lunch in the cafeteria and expressing their hopes for college.

This month, 20-year-olds Irma Murhutta, Ricardo Loyola and Moises Zelaya are back at their alma mater.

This time they’re at the front of the class, teaching. “I used to walk in these halls, played on these fields, parked in the parking lot,”

Murhutta said. “It’s strange being on the other side.”

For lack of a better word, she said, it’s “weird.”

During their senior year at Reservoir, all three were identified as academically successful students from households below median income levels, and were chosen for a partnership between Howard County schools and McDaniel College — at the time called Teachers for Tomorrow — which was designed to encourage teacher diversity.

They received full scholarships, and in exchange were guaranteed jobs in the county school district for at least three years upon graduation.