The data sgp is a set of student growth percentiles that show the progress of students in a given school. The percentiles are calculated from student assessment scores over time. A high number means the student is improving rapidly and a low number indicates the student is falling behind his or her academic peers. These percentiles are useful because they keluaran sgp describe a student’s progress using a common language that is understood by teachers and parents. The data sgp is provided to teachers and administrators by the state education departments, but it may be difficult for educators to obtain this information in a usable format.
To make it easier for educators to access this data, the SGP package provides a collection of tools and functions to simplify operational SGP analyses. The package’s lower level functions such as studentGrowthPercentiles and studentGrowthProjections operate on WIDE data formats, but higher-level wrapper functions are designed to work with LONG formatted data. For more information on using these higher level functions, consult the SGP Data Analysis Vignette.
A good way to think about SGP is as a measure of progress for all students, regardless of their starting performance levels. This is because the percentiles are determined relative to students with similar prior test scores (academic peers). In other words, a student could start out with a poor score but still improve dramatically from year to year. This is what makes SGP so important, as it measures student improvement even when students achieve at a low level.
To calculate a student’s progress, the SGP package employs two steps: an estimate of the student’s prior test score and a comparison between the student’s current performance and that estimate of their prior performance. To compensate for estimation errors, the SGP package has built-in functions to ensure that the percentiles are as accurate as possible. These functions, called sgpData, take an Excel file as input and return a matrix of values for the student’s overall score. The first column, ID, provides the unique student identifier and the last 5 columns, SS_2013, SS_2014, SS_2015, SS_2016, and SS_2017, provide the scale scores associated with the student in each of the five years of test data.
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