Data SGP
Data sgp is a system that utilizes longitudinal student data to produce statistical growth plots (SGP). A SGP describes a student’s current test score as a percentage of students with similar prior test scores (their academic peers). SGPs allow us to communicate a student’s growth in percentile terms that are familiar to teachers and parents. SGPs are based on the statistical analysis of a student’s long-term performance record and are intended to be more accurate than unadjusted test scores.
The most important aspect of a SGP is that it provides accurate, meaningful, and useful information about a student’s growth. A SGP indicates how much a student’s current test score improved over their entire academic history. It also shows how much a student’s current test scores improved over the average for their class. The SGP reflects a student’s growth in all subject areas, including reading, writing, math, science, and social studies.
SGPs can be calculated from a variety of sources, but the best source for an accurate and reliable SGP is an official assessment. An official assessment is one that has been administered by a state or national agency that meets certain quality assurance and security standards, including the use of certified test administrators and an approved test specification. Official assessments typically have a longer history than other tests, are administered to large groups of students, and are used by multiple schools.
An example of a sgp data set is sgpData, which contains 5 years of student assessment data in wide format. The first column, ID, provides the unique student identifier and the next five columns, GRADE_2013, GRADE_2014, GRADE_2015, GRADE_2016, and GRADE_2017, provide the grade level of each student’s assessment score in each of the 5 years of data. The final row, SCORE_2013, demonstrates the scale score that was assigned to each student during each of the 5 assessment occurrences in 2013.
While sgpData is an excellent example of a sgp data, the use of wide-format data with the SGP package is, in general, straight forward. For more comprehensive documentation on using sgpData and SGP, please refer to the SGP data analysis vignette.
If you have any questions about data sgp or would like to discuss them with an expert, please contact our SGPS Support Team. We are available 24/7 to assist you with your needs. We look forward to working with you!