GL Assessment is the leading provider of assessments to UK schools.

Through building close relationships and forging lasting partnerships, we specialise in developing and providing a comprehensive range of assessments and services to schools around the world. Today, we lead literacy, numeracy and ability testing in UK schools and operate in over 100 countries worldwide. We have pioneered e-assessment and delivered over 7 million online tests, giving teachers accurate and speedy insights to help them maximise every student’s achievement.

We’ve developed this guide to give you an overview of standardised tests, how they’re developed, how to interpret results, and how your school can benefit from the data produced from using standardised assessments.