angeles california 1926 founder ethel clark headquarters 20 ryan ranch road monterey california united states area served worldwide parent data recognition corporation drc website ctb.com drc ctb ctb a division of data recognition corporation drc is a publisher of educational assessment for the early learner k 12 and adult basic education markets . 1 ctb has published many assessments including california achievement tests cat tests of basic experiences tobe and terranova . 2 contents 1 history 2 today 3 tests 3.1 current 3.2 out of print 4 see also 5 external links history edit ctb was established in 1926 in los angeles by ethel clark . 3 clark s husband willis had developed the los angeles diagnostic tests in the fundamentals of arithmetic which she bought the rights to sell . she sent out 25 cent postcards advertising the availability of the test to various districts around the country . 4 one year later she heard from her first customer the kansas city school district . 5 in 1960 the company relocated to monterey california where the company headquarters are currently located . 6 7 in 1965 ctb was acquired by mcgraw hill education and became ctb mcgraw hill . 2 on june 30 2015 mcgraw hill education announced that data recognition corporation drc had agreed to acquire key assets of the ctb mcgraw hill assessment business . 8 today edit ctb serves more than 18 million students in all 50 states and 49 countries . 9 ctb s current president is ellen haley . 10 in 2002 ctb reportedly had a 40 percent share of the test design market ranking second of the four major companies in the industry . 11 in 2011 ctb acquired bookette a privately held software company . in june 2011 ctb celebrated its 85th anniversary . 12 tests edit current edit terranova terranova is an assessment battery that was introduced in 1996 . 13 the first terranova assessment released in 1996 was a result of the updates of the california achievement tests and the california test of basic skills . in 2006 ctb introduced terranova third edition . terranova 3 was the first norm referenced test nrt . 14 tests of adult basic education tabe tests of adult basic education tabe is an adult basic education assessment . 15 tabe was introduced in 1967 . 16 in 2007 tabe complete language assessment system english tabe clas e was introduced . 17 test assessing secondary completion tasc test assessing secondary completion tasc is a state of the art affordable new national high school equivalency exam . 18 tasc was introduced in 2013 . 19 it assesses five subject areas including reading writing mathematics science and social studies . it measures examinees levels of achievement relative to that of graduating high school seniors and career and college readiness as outlined by the common core state standards . 20 las links las links is a language proficiency assessment introduced in 1987 . 21 first performances first performances is an assessment for early learners . it includes tests in concepts of letter and number . out of print edit california achievement tests the california achievement tests cat are among the most widely used tests of basic academic skills for children from kindergarten through grade 12 . the most recent edition of the cat the sixth is also called terranova third edition or alternately terranova cat . the california achievement tests were introduced in 1934 as the progressive achievement test . 22 the test was renamed as the california achievement test in 1950 and was designed to individually diagnose student performance . 23 progressive achievement test introduced in 1933 the progressive achievement test was the predecessor to the california achievement tests and now terranova . it was authored by drs. ernest t. tiegs and willis w. clark . the progressive achievement test was considered to be one of the most reliable assessments of its time . 24 the california test of mental maturity introduced in 1936 the california test of mental maturity provided insight into mental traits of individual students . authored by drs. elizabeth t. sullivan willis w. clark and ernest t. tiegs scores from the california test of mental maturity are still valid as a qualifier for mensa international membership qualifying test score is 132 . 25 also the triple nine society accepts ctmm test results qualifying score of 149 26 see also edit educational assessment mcgraw hill education psychometrics external links edit drc ctb s official website references herszenhorn david m. 5 may 2006 . as test taking grows test makers grow rarer . new york times . retrieved 9 june 2011 . a b ctb history . retrieved 27 may 2011 . ctb mcgraw hill about us accessed may 31 2011 wallace lane . 25 cent gamble started ctb . monterey herald . retrieved 1 august 2011 . ctb mcgraw hill celebrates 85 years of innovation and excellence in educational testing . the sacramento bee . retrieved 22 june 2011 . ctb . retrieved 31 may 2011 . corporate history . about us corporate history . mcgraw hill . retrieved 8 june 2011 . data recognition corporation drc announces agreement to acquire key assets of the ctb assessment business of mcgraw hill education . iste 2011 exhibitor profiles . retrieved 22 june 2011 . ctb mcgraw hill llc . ctb mcgraw hill llc . bloomberg businessweek . retrieved 8 june 2011 . the testing industry s big four . pbs . retrieved 21 june 2011 . ctb mcgraw hill still a testing leader after 85 years . monterey county herald . retrieved 1 august 2011 . ctb history . retrieved 27 may 2011 . ctb history . retrieved 27 may 2011 . adult education testing and assessment products . ctb history . retrieved 27 may 2011 . tabe clas e . ctb . retrieved 22 june 2011 . new national high school equivalency exam . april 2013 ctb news check url value help . tasc test . our heritage timeline . swafford karla lairsey . the use of standardized test scores a historical perspective pdf . http ugakr.libs.uga.edu bitstream handle 10724 17120 swafford karla 200712 edd.pdf sequence 1 . retrieved 8 june 2011 . external link in work help walsh mark . education week quiz biz . edweek.org . retrieved 2013 10 30 . our heritage timeline . our heritage . ctb.com . retrieved 2 august 2011 . qualifying test scores american mensa ltd . us.mensa.org . retrieved 2013 10 30 . triple nine society admission . triplenine.org . 1999 12 31 . retrieved 2013 10 30 . retrieved from https en.wikipedia.org w index.php title drc ctb & oldid 732464791 categories publishing companies established in 1926publishing companies of the united stateshidden categories pages with url errorscs1 errors external links navigation menu personal tools not logged intalkcontributionscreate accountlog in namespaces article talk variants views read edit view history more search navigation main pagecontentsfeatured contentcurrent eventsrandom articledonate to wikipediawikipedia store interaction helpabout wikipediacommunity portalrecent changescontact page tools what links hererelated changesupload 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