mainframeOur history began in 1952 with a fortuitous conversation between Mathematics Professor Oliver F. Anderhalter and Loyola University Press Sales Manager Herbert J. Greig. The two men met at a St. Louis University workshop hosted by Dr. Anderhalter. During the workshop, Dr. Anderhalter asked Mr. Greig how well students were learning from the textbook series used at the workshop. Mr. Greig replied that he had no idea because there was no test to assess the success of the series. Dr. Anderhalter proposed developing a test for the series, which Mr. Greig would market. The two men agreed on the concept and Scholastic Testing Service was born. Mr. Greig rented a small room from the University of Chicago to serve as our first office, and the company was incorporated in Illinois in 1953.

Dr. Anderhalter and Mr. Greig worked in concert to develop our very first tests. Mr. Greig brought textbooks, lesson plans, and teacher curriculum notes to Dr. Anderhalter and a group of graduate students, who used these materials to create a series of questions. These first tests were criterion referenced and developed around the curriculum of particular school districts. They were then marketed to superintendents to help assess teacher accountability for the textbook series.

Today STS offers a wide array of achievement, readiness, and gifted assessments. These assessments include the world renowned Torrance Tests of Creative Thinking and the bestselling High School Placement Test.

STS has two divisions - the Sales and Editorial Division in suburban Chicago and the Research and Administrative Division/Scoring Center in suburban St. Louis. Both divisions are led by Dr. Dennis Anderhalter.

Business Hours

Monday - Friday 8 am to 4 pm
Saturday - Closed
Sunday - Closed

Sales and Editorial Division

Address: 480 Meyer Rd
Bensenville, IL 60106-1617

Phone: 1-800-642-6STS (6787)

Phone: 1-630-766-7150

Fax: 1-866-766-8054

Email: [email protected]

Research and Administrative Division / Scoring Center

Address: 4320 Green Ash Dr.
Earth City, MO 63045

Phone: 1-314-739-3650

Fax: 1-314-739-3650

Email: [email protected]

On our website we collect certain types of personal information including: name, address, e-mail address, phone number, and credit/debit information. This information is used for three purposes:
to complete orders,
to mail orders,
and to provide additional customer service.
Your credit/debit information is used only to complete your order. We do not share this information with outside parties except to the extent necessary to complete that order. Be assured that we use a secure web server to encrypt all personal information and that all credit card transactions are processed only by STS.

Your phone number, address, and e-mail address are used to complete your order and may also be used in order to follow up on the order you placed. This information is not shared with any outside parties except to the extent necessary to complete the order.

Finally, we never use or share personally identifiable information in ways unrelated to the ones described above without also providing you an opportunity to opt out or prohibit such uses. Should you have questions or concerns about our privacy policy, please e-mail [email protected] or call 1.800.642.6STS.

Scholastic Testing Service, Inc. reserves the right to update this privacy policy. Please check our website periodically for changes.

Scholastic Testing Service Family Education Rights and Privacy Act (FERPA) Policy - Scholastic Testing Service, Inc., in compliance with FERPA, provides that all personally identifiable information is confidential and available only to the student. While Scholastic Testing Service, Inc. is prohibited from releasing any confidential information, you may, at your discretion, grant permission to a third party to access information from your records. A PDF copy of the permission form. can be found here.