USA Kid's Competitive Tests - TAG, CogAT, ITBS

Achievement Tests:

• Gifted and Talented Education (GATE) / Talented and Gifted (TAG)
• Cognitive Abilities Test(CogAT)
• Iowa Tests of Basic Skills (ITBS)
• California Critical Thinking Skills Test (CCTST)
• Primary Test of Cognitive Skills(PTCS)

State Assessments:

• California Standardized Testing and Reporting (STAR)
• Illinois Standards Achievement Test (ISAT)
• North Carolina Competency Test

Book publishers:

Riverside publishers(http://www.riversidepublishing.com/)

Spectrum

ref:

Kid's state assessments & competitive Tests in US - http://www.criticalthinking.com/test-directory

Kid's Mathematics worksheets - http://www.mathworksheets4kids.com/

Kid's online tests - http://www.testingmom.com/

CogAT Test prep - 

1. http://riversidepublishing.com/products/cogAt/index.html
2. http://www.mercerpublishing.com/cogat.html
3. http://www.testingmom.com/free-cogat-test-prep-questions/
4. http://www.cogat.net/
5. http://gtprep.com/free/cogat/
6. http://www.criticalthinking.com/articles/test-preparation-practice-for-cogat-assessment
7. http://www.120perhour.com/cogat-sample-test-index.htm

IOWA Test prep -

1. http://www.riverpub.com/products/itbs/details.html
2. http://www.time4learning.com/testprep/index.php/iowa-itbs-and-ited-test-prep/
3. http://www.iowatest.net/

TAG Test prep - 

1. http://www.criticalthinking.com/articles/test-preparation-practice-for-gate-and-tag-assessments
2. http://testingforkindergarten.com/tag/gate-testing
3. http://www.testingmom.com/ppc/gifted-and-talented-test-practice/
4. http://www.getyourchildintogat.com/p/gifted-and-talented-test-preparation.html