What is the Texas Growth Index (TGI)?
The TGI was developed for accountability purposes to evaluate individual student growth from one year to the next on the TAKS. The TGI compares how students taking a TAKS subject test in one year perform on the same TAKS subject test in the next higher grade the following year. An individual TGI score indicates the amount of growth for each student in relation to the average growth of all students who performed at the same level in the base year. The TGI score of zero (0) indicates that the year-to-year change in scale score is equal to the average change. The TGI measures growth for a student who passes as well as a student who does not pass the TAKS. The TGI calculation is limited to students who have TAKS test results in the same subject for two consecutive years, in consecutive grades. Since TPM results are not available at grade 11, TAKS grade 11 tests having a TGI score of zero (0) or higher will continue to be included in the numerator of the TAKS Progress indicator. Detailed TG
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