The author created a project aimed to develop and implement the assessment of working scientifically (WS) skills at Victoria Park Primary School. The author had previously identified a gap in the curriculum coverage and assessment of WS skills and his goal was to address the lack of provision for assessing children's WS skills and raise the confidence of teachers in assessing these skills. Having raised the profile of science in the school he felt it necessary to develop further support for teaching and assessing the WS skills. As part of Teacher Assessment in Primary Science (TAPS) 'Responsive Teaching,' ongoing formative assessment should include: 'Teachers gather[ing] evidence of their pupils' learning through study of the products of activities and tasks' and the author felt that the TAPS Focused Assessments could help to do this. In this article, the author considers a range of strategies that help to support the teaching of working scientifically within schools and lead to effective assessment.