Every student in the Swedish compulsory school system is entitled to information regarding their progress in all school subjects given. In 2008, a mandatory assessment tool, called the individual development plan (IDP) with written assessment, was introduced by the Government. The statutory purpose was to provide teachers with a formative assessment tool to be used mandatory in the follow-up of student's progress all thru mandatory compulsory school (year 1-9). This study explores the use of the IDP documents in technology education. Authentic documents from different municipalities, different schools and different school years have been studied. In this article findings regarding formal assessment documents and teacher's formal assessment practice in primary (year 1-6) technology education are presented.