Improving Progress for Lower Achievers through Formative Assessment in Science and Mathematics Education (FaSMEd) is a EU-funded project designed to investigate the use of technology in formative assessment classroom practices in ways that allow teachers to respond to the emerging needs of learners in mathematics and science. The project is aimed at working with teachers and learners in science and mathematics education across eight countries. The UU project revolves around the Digital Assessment Environment (DAE): an environment containing tests specifically designed to enable teachers to use student work in mathematics in a formative way. The DAE provides teachers with rich data on their students' understanding through auxiliary tools: digital tools which the students can employ to help them solve a problem, and may help the teacher find out which steps they took in obtaining their answers.