The Christian Homeschool Network has provided this information for your use. We are a grassroots political organization focused on lobbying and advocating for homeschool freedoms. For other testing information, we suggest that you contact state or local support groups for testing services in your area.

The section of the home-based instruction law RCW 28A.200 regarding testing.

(c) Ensure that a standardized achievement test approved by the state board of education is administered annually to the child by a qualified individual or that an annual assessment of the student’s academic progress is written by a certificated person who is currently working in the field of education. The state board of education shall not require these children to meet the student learning goals, master the essential academic learning requirements, to take the assessments, or to obtain a certificate of academic achievement or a certificate of individual achievement pursuant to RCW 28A.655.061 and 28A.155.045. The standardized test administered or the annual academic progress assessment written shall be made a part of the child’s permanent records. If, as a result of the annual test or assessment, it is determined that the child is not making reasonable progress consistent with his or her age or stage of development, the parent shall make a good faith effort to remedy any deficiency.

WAC 180-52-070
Approved standardized tests for use by students receiving home-based instruction — Examples — Assistance. (effective April 02, 2002)
(1)(a) Pursuant to RCW 28A.200.010(3), the state board of education will provide a list of examples of standardized achievement tests that a parent may use to assess and determine whether their child is making reasonable academic progress.
(b) Tests on the list are approved by the state board of education on the basis that they are standardized achievement tests.
(c) Parents may use a standardized test that does not appear on the list of examples if it has been evaluated by a test evaluation organization recognized by the state board of education and cited on the state board web page.
(d) Parents may contact the state board of education office for assistance in determining if a test of their choosing that is not on the list of examples is standardized.
(2) The list of examples of standardized achievement tests shall be:
(a) Made available on the web page of the state board;
(b) Included in the following publication of the office of the superintendent of public instruction, 
“Washington’s State Laws Regulating Home-Based Instruction;” and
(c) Provided on request.
(3) The list of examples of standardized achievement tests on the state board web page may not be changed without prior approval of the state board of education. [Statutory Authority: RCW 28A.200.010(3). 02-14-125, § 180-52-070, filed 7/2/02, effective 8/2/02.]

Home-based Students and the WASL

Washington State Board of Education Examples of Approved Standardized Achievement Tests for Home-Based Instruction Use Parents providing home-based instruction for their children may use any standardized achievement test that has been evaluated by Buros Institute of Mental Measurements (www.unl.edu/buros), the test evaluation organization recognized by the State Board of Education under WAC 180-52-070.

Testing is one of two options for meeting the statutory annual assessment requirement: [See RCW 28A.200.010]. The tests listed below are examples of the kinds of tests parents may use.

Approved WA State Homeschooling Standardized Test Options (partial listing)

Examples of the kinds of tests parents may use; Research for full info & to see which best fits your family
Test Name abbrev. Publisher
1 American College Testing ACT American College Testing, Inc.
2 Brigance Curriculum Associates, Inc.
3 California Achievement Tests, 5th ED CAT/5 CTB/McGraw Hill
4 California Diagnostic Tests CDT CTB/McGraw Hill
5 Comprehensive Tests of Basic Skills CTBS CTB/McGraw Hill
6 Iowa Tests of Basic Skills ITBS Riverside Publishing
7 Iowa Tests of Educational Development ITED Riverside Publishing
8 Metropolitan Achievement Tests, 7th Ed. MAT/7 Harcourt Educational Measurement
9 Peabody Individual Achievement Test PIAT American Guidance Service, Inc.
10 PLAN Pre-ACT American College Testing, Inc.
11 Preliminary Scholastic Achievement Test PSAT The College Board
12 SAT and SAT Subject Tests n/a The College Board
13 Stanford Achievement Tests SAT Harcourt Educational Measurement
14 Stanford Early Achievement Tests SEAT Psychological Corporation
15 Terra Nova CTB/McGraw Hill
16 Tests of Achievement & Proficiency TAP Riverside Publishing
17 WA State Assessments MSP, HSPE, EOC Washington State
Administering Organizations & Businesses (partial listing)
1 Basic Skills Assessment & Ed. Services Onsite-Group Oregon City, Oregon
2 Family Academy Onsite-Group Several Locations in WA
3 Nelmark Assessments Onsite-Group Longview, WA
4 River City Educational Services Onsite-Group McCleary, WA
1 Bob Jones University Press Mail Order/Home Greenville, SC
2 Family Learning Organization Mail Order/Home Spokane, WA
3 Hewitt Homeschooling Resources Mail Order/Home Washougal, WA
4 Inland Empire Homeschool Center Mail Order/Home Airway Heights, WA
5 Seton Testing Services Mail Order/Home Royal, VA
6 Sycamore Tree Mail Order/Home