Assessments can provide valuable feedback to students about their understanding and performance. This feedback helps students identify their strengths and areas for improvement, guiding their learning progress and helping them focus on specific skills or knowledge gaps. However, regularly the opportunity to inform teaching through assessment is either missed or misguided through poor assessment techniques and tools. Understanding the differences between ‘testing’ students and ‘measuring learning’ is a key part of assessment literacy that is often not well understood by teachers. This session will unpack some key aspects of assessment literacy and provide practical examples of measuring learning from ACER’s 95 years of research and experience in assessment.