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Contact Us

Toll free: (877) 687-7200

Hours: Monday - Friday 10:00am - 5:00pm CST

Mailing address:
Knowledge Headquarters, Inc.
2525 Arapahoe Avenue, E4-177
Boulder, CO 80302

Team Members

  • Dr. Martha Angulo, CEO/President:
  • Kate Biedrzycka, Tutor/Editor:

What is e-Tutor?

Established in 1997, e-Tutor is an accredited online school for grades K-12 built on a simple philosophy:

  • Students learn more when given choices.
  • Parents are educators.
  • Online schools should be online schools.

More about e-Tutor.


  • Easy credit transfer
  • Quality assurance
  • Access to loans & scholarships

More about accreditation.