Located in Northeast Minneapolis, Heartwood Montessori is a non-profit program serving children from 16 months of age through six years old. All applicants must. qualify under. MN Dept. Human Services’ Rule 3. as a Lead or Assistant teacher, or Aide. pass a Federal background check. have, or be willing to attain Pediatric First Aid and CPR certification. have documentation of eligibility to work in the United States. demonstrate professionalism, ...