As part of the release plan for the Texas Assessment of Knowledge and Skills (TAKS), the Texas Education Agency (TEA) releases the primary form of TAKS tests every three years. In non-release years, TEA releases a set of representative items that have been field-tested but are no longer eligible for inclusion on an actual test.
The released set of representative TAKS items for every grade and subject assessed—both in English and in Spanish—includes an answer key, which provides the objective, the TEKS student expectation, and the correct answer for each item.
Here are the released items for 2010:

TAKS:
__http://www.tea.state.tx.us/index3.aspx?id=3850&menu_id=793__
TAKS-M:
__http://www.tea.state.tx.us/index3.aspx?id=2147485817&menu_id=793__
Texas Math and Science Diagnostic System (TMSDS) http://www.tmsds.org

Region 9 Released TAKS Questions by TEKS http://www2.esc9.net/taks/MathCorrelation/IndexSE.html
Region 9 Released TAKS Questions by Objective http://www2.esc9.net/taks/MathCorrelation/IndexObjective.html

Online Versions of TAKS Study Guides from TEA - http://www.texasassessment.com/studyguides

Open Ended TAKS Problems - fi.edu/school/math2/index.html

Math Counts - http://mathcounts.org/Page.aspx?pid=195

Free Test Prep Questions from Princeton Review - TImathrocks.com/TPR/freetestprep

Mathematics Benchmarks, K-12: www.utdanacenter.org/k12mathbenchmarks


TEKS Support Resources -
http://cms.springbranchisd.com/math1/TAKSResources/tabid/5264/Default.aspx

Test and Worksheet Generators for Math Teachers - http://www.kutasoftware.com/