The Teacher Assessment in Primary Science (TAPS) Focused Assessment approach embeds assessment within normal classroom science activities. Essentially, a Focused Assessment is a lesson plan for a science inquiry, with an identified focus for assessment and guidance on how to interpret the children's responses in relation to expectations for that age group. In this article, the author examines what the challenges are in more depth and explains how the TAPS Focused Assessment approach offers a manageable response to them.