| Business | Phone |
| Jones Reading & Math Clinics 850 N Diamond Bar Blvd, Diamond Bar 91765 | (909) 612-1917 |
| Aptus Educate 3207 S Brea Canyon Rd, Diamond Bar 91765 | (909) 468-9097 |
| Chung's Scholastic Tests Inst 1930 S Brea Canyon Rd # 170, Diamond Bar 91765 | (909) 396-6720 |
| Diamond Bar Learning Center Diamond Bar 91765 | (909) 860-0468 |
| Gate Academy 2141 S Brea Canyon Rd, Diamond Bar 91765 | (909) 595-6860 |
| Head Start Academy 3207 S Brea Canyon Rd, Diamond Bar 91765 | (909) 598-3710 |
| Yfc Education Center 21337 Cold Spring Ln, Diamond Bar 91765 | (909) 468-2066 |
| Ivy League School 21308 Pathfinder Rd # 209, Diamond Bar 91765 | (909) 396-5210 |
| Jelic Math Tutoring 3207 S Brea Canyon Rd, Diamond Bar 91765 | (909) 595-5553 |
| Tutor World 20627 Goldn Springs Dr # 2c, Diamond Bar 91765 | (909) 444-9009 |
| Kumon Educational Center Diamond 23555 Golden Springs Dr # C, Diamond Bar 91765 | (909) 860-9865 |
| Lee's Review 1930 S Brea Canyon Rd, Diamond Bar 91765 | (909) 612-5700 |
| Lee's Review 2040 S Brea Canyon Rd, Diamond Bar 91765 | (909) 612-5700 |
| Odyssey Test Prep Think Sat Diamond Bar 91765 | (909) 569-1970 |