This article is an initial evaluation of a motor skills assessment for primary aged children. The Manchester Motor Skills Assessment (MMSA) is designed to be quick and easy for teaching assistants to complete, with the dual purposes of informing group programme planning and demonstrating an individual child's progress following a period of intervention. Inter-rater reliability checks were conducted during initial assessments of 37 children in 11 schools. Focus groups discussed practical relevance of the tool. The evidence from this small-scale study suggests that a range of assessors can reliably complete the MMSA. The tool also taps into functionally relevant motor skills for primary age children and informs programme planning. The MMSA appears to be a promising tool for supporting primary schools in identifying children with motor skills difficulties. The contribution of EPs to the MMSA's development and implementation is discussed. (Contains 3 tables. Appended are: (1) KS1 Motor Skills Assessment; and (2) Key Stage 2 Motor Skills Assessment.)