Schools had started piloting the Renewed Content of Education with Grade 1 in September 2015, then moved on to Grade 2 in 2016 and to Grade 3 in September 2017. The pilot schools acted as test sites one year ahead of the full roll-out to all mainstream schools in Kazakhstan. The research evidence collected over the two-year period comprises a mixed sample of primary grade (Grades 1–4) teachers, comparing those starting their second or third year of teaching the new content with those who were yet to have direct experience of it. Interviews and/or focus groups with teachers, school principals and vice-principals were conducted in each of six schools. In addition, primary grade teachers were invited to respond to surveys. The areas of inquiry included overall opinions as well as more targeted attitudes towards the revised content of the curriculum, changes to teaching and learning, new approaches to assessment and the support afforded to implement the new curriculum. The chapter will show that piloting had been a very worthwhile step in the implementation of a new curriculum, with a growing confidence and appreciation of what this curriculum aimed to achieve.