| Business | Phone |
| Ombudsman Educational Svc 4111 S Old Highway 94, St Charles 63304 | (636) 939-9976 |
| Huntington Learning Ctr 4139 S Old Highway 94, St Charles 63304 | (636) 928-3900 |
| Harvester Kumon Math & Reading 3930 S Old Highway 94, St Charles 63304 | (636) 447-9235 |