The document provides information about different metrics and terminology used to evaluate student progress and performance. It includes definitions of terms like average points score, average predicted grade, average target grade, and ALPS (Average GCSE point score linked to expected outcome). It also defines levels of attainment (lower, middle, higher tiers) and how to interpret UMS, UCAS, and SCATT scores. The key information is how to use the data - look for underperformance, trends, compare classes, consider residuals and prediction quality, and use it as a signpost for differentiation and sharing best practices rather than an end in itself.