**Summary**

The subject specific STAAR Raw Score mean and standard deviation (2018-2019 Technical Digest) are used to convert individual student raw scores into standard score. A standard score is a raw score expressed in terms of how many standard deviations it is away from the population mean.

Once a standard score is calculated for each year filtered for each student, the difference (z-score current year – z-score previous year) is calculated. To be included in this calculation, a student must have a raw score for each year. If a student did not take the test or took a different version of the test, the student would not be included in the calculation for this report.

**Usage**

Identifies individual student growth by teacher as compared to the performance of the population in the state. By definition, the average standard score of the population in the state would be 0. Any number greater than 0 equals greater than average performance as compared to the population in the state. Conversely, any number less than 0 would equal less than average performance as compared to the population in the state. Report provides standard score for selected year, previous year standard score, and the difference or growth score (z-score current year – z-score previous year).

**Data Sources**

STAAR

- Raw Scores (Students must have a raw score on record for both the previous and current year on the same test version, to be included in this report)
- STAAR Mean (2018-2019 Technical Digest)
- STAAR Standard Deviation (2018-2019 Technical Digest)

**Definitions**

- Growth: (z-Score current year) – (z-Score previous year)
- Average Growth: (z-Score current year) – (z-Score previous year) / (Total # of Students)
- Positive Growth: Number of Students with an increase in the standard score form the previous year to the current year.
- Negative Growth: Number of Students with a decrease in the standard score form the previous year to the current year.
- Mean: The average calculated by summing all the values in a data set and dividing by the number of cases.
- Standard Score: A raw score expressed in terms of how many standard deviations it falls away from the mean (also known as z-score).
- Standard Deviation: Tells the average distance by which average scores deviate from the mean.
- z-Score: A raw score expressed in terms of how many standard deviations it falls away from the mean (also known as standard score).
- Bar Graph:
- x-axis: Is labeled in increments of standard deviations of standard scores. By definition, zero (0) equals the average performance in the state. Any number greater than 0 equals greater than average performance as compared to the population in the state. Conversely, any number less than 0 would equal less than average performance as compared to the population in the state. The values for the
**current**and**previous**year is the student’s standard score, and the value on the**gr****owth**represents the difference between those values. - y-axis: Is labeled by students from the STAAR records who have a raw score for both the current and previous year selected on the same test version.

- x-axis: Is labeled in increments of standard deviations of standard scores. By definition, zero (0) equals the average performance in the state. Any number greater than 0 equals greater than average performance as compared to the population in the state. Conversely, any number less than 0 would equal less than average performance as compared to the population in the state. The values for the

**Filters**

Single-select:

- Subject
- Year
- Grade
- Campus
- Teacher
- Version
- Admin Month
- Language
- Test Admin Mode
- Ethnicity (Optional)
- Special Population (Optional)
- Focus List (Optional)