Missing data are a pervasive problem in data analysis. Three common methods for addressing the problem are (a) complete-case analysis, where only units that are complete on the variables in an analysis are included; (b) weighting, where the complete cases are weighted by the inverse of an estimate of the probability of being complete; and (c)…

Educational assessment is used throughout the world for a range of different formative and summative purposes. Wherever an assessment is developed, whether by a teacher creating a quiz for their class, or by a testing company creating a high stakes assessment, it is necessary to decide how long the test should be. Specifically, how many questions…

Since its introduction in 2017, NFER has been contracted by Ofqual to develop, deliver and analyse the results of the National Reference Test (NRT) in English and Maths. The NRT is administered annually and shows if student performance in English and maths at GCSE level has changed from year-to-year. This year, more than 13,000 Year 11 students…

Using rich longitudinal data from the UK's Millennium Cohort Study (MCS), the authors compare the performance of private and state school pupils in age 16 national examinations (GCSEs) in England, where private schools are particularly well resourced by international standards. Performance among pupils attending private secondary schools is…

Since its introduction in 2017, NFER has been contracted by Ofqual to develop, deliver and analyse the results of the National Reference Test (NRT) in English and maths. The NRT is administered annually and shows if student performance in English and maths at GCSE level has changed from year-to-year. This year, more than 13,000 Year 11 students…

Since its introduction in 2017, NFER has been contracted by Ofqual to develop, deliver and analyse the results of the National Reference Test (NRT) in English and maths. The NRT is administered annually and shows if student performance in English and maths at GCSE level has changed from year-to-year. This year, around 13,000 Year 11 students from…

Administrative data are increasingly being used to study inequalities in education. Yet a well-known difficulty with such resources is the limited information they hold. A commonly used proxy for children coming from a low-income background is their eligibility for free school meals, yet this is likely to be of little use in measuring academic…