Educational Testing Services (ETS) is an organization that provides a range of products and services, including research, test administration, test scoring, and more. This organization develops and administers AP, GRE, and SAT tests, among others.

Seton provides affordable, nationally standardized testing, including ability and achievement tests, practice tests, and test prep materials for homeschoolers, private schools, and home school groups. Testing services and materials are available for grades K-12. Tests include the Stanford 10 Online, CAT E-Survey, IOWA Form E, and TerraNova 2/CAT 6. Ordering is easy and you will get test results returned within two weeks. 

Although this article has some outdated date information in it, it is a good discussion of the use of the PSAT/NMSQT (Preliminary Scholastic Aptitude Test and National Merit Scholarship Qualifying Test) for homeschoolers, especially those who are interested in qualifying for certain scholarships.

The National Center for Fair & Open Testing (FairTest) works to end the misuses and flaws of standardized testing and to ensure that evaluation of students, teachers and schools is fair, open, valid and educationally beneficial. They place special emphasis on eliminating the racial, class, gender, and cultural barriers to equal opportunity posed by standardized tests, and preventing their damage to the quality of education. Based on Goals and Principles, they provide information, technical assistance and advocacy on a broad range of testing concerns, focusing on three areas: K-12, university admissions, and employment tests. FairTest publishes a quarterly newsletter, The Examiner, plus a full catalog of materials on both K- 12 and university testing to aid teachers, administrators, students, parents and researchers. They also have numerous fact sheets available on standardized testing and alternative assessment.

Piedmont Education Services offers the Iowa Tests of Basic Skills (ITBS) and the Woodcock-Johnson III Tests of Achievement (WJ-III), along with test prep materials.

As home schooling grows as a movement, there is increasing politics from anti-home school forces to try to interfere with or legislatively control home schoolers. This has come to include legislative attempts to force home school students to take standardized tests along with public school students. But mandatory testing doesn't work in public schools, and it won't work for home schoolers.

PLATO Learning, Inc. delivers just-in-time online assessments that are tied directly to state and provincial standards. Their courseware includes thousands of hours of basic to advanced level instructional content for K-adult learners. They provide web based assessments that assist in placement, progress monitoring, and accountability requirements with diagnostic and prescriptive tests, simulated high-stakes tests, lesson progress tests, standards-based tests, and cumulative tests.

The Princeton Review offers personalized private tutoring, test prep, and admission products and services to help students knock down barriers and achieve their academic goals. Search for schools and careers, find test preparation courses, get information on scholarships, and more. Covered tests include: ACT, AP, PSAT, SAT, SAT Subjects, TOEFL, ISEE, MCAT, DAT, OAT, LSAT, GRE, GMAT, CFA, and USMLE.

Family Learning Organization offers standardized tests for homeschooling families. Through their Educational Assessment & Testing Service, tests may be obtained by parents to administer to their homeschooled children. Their services include standardized achievement tests (California Achievement Test, Fifth Edition), review of parent-administered assessments by a certified teacher, toll-free telephone answers to your questions about administering tests and interpreting results, and computerized score printouts for tests including Percentile Rankings, Grade Equivalencies, Stanine Scores and Scaled Scores, where applicable.

Catforms Testing Service offers the 1970 California Achievement Tests with their own answer sheets and computer scoring. Key features of this system include graphical results in color, cumulative comparisons from year to year, and a detailed analysis of strengths and weaknesses in each area of the test. In addition to the original 1970 norms, they also have their own norms, the Catforms Percentiles, which are updated annually from the tests they have on file. The Catforms Percentiles are not a national norm, but are useful in comparing your students' performance with others from Christian schools and home schools today.

Crosspointe Educational Services is a mail order service that offers state-approved Survey and Complete Battery California Achievement Tests (CAT) in an effort to meet your testing needs. Their flexibility allows you your choice of testing dates and the opportunity to administer the test in the comfort of your own home; or you may choose to test with your support group or choose someone outside your home school to test your student.

When the first SAT was created, it was named the Scholastic Aptitude Test, signaling that its creators and the education world believed it to be a test of aptitude, or, a student’s ability to perform well in college. Aptitude tests supposedly measure talents that indicate possible achievement in the future, while achievement tests supposedly reveal how much someone has learned in the past. All these years later, we know the test never really did measure anybody’s aptitude to do well in college.

Triangle Education Assessments offers the Iowa Tests and Woodcock-Johnson III Tests of Achievement.

Many parents arrive in the world of gifted education with a report full of tests results, supposedly defining their child as "gifted." But more often than not, parents have more questions than answers upon receiving those test results. And just as often, the short answers from the psychologist, the school, the teachers, and other parents do more to confuse than clarify.

Bayside School Services offers do-it-yourself standardized achievement tests, available all year. Bayside gives you original publisher materials plus genuine CTB scoring reports, including free practice tests for all grades where available. Test prices include shipping, handling, scoring and all practice tests. Special pricing available for group orders.