Effektiv subtraktionsundervisning i praktiken : Subtraktions- undervisning, strategier och diagnoskonstruktion för en årskurs 2

The aim with this study was to investigate the content and form of the subtraction education in a second grade classroom. Three issues were focused. First how the subtraction education was held in a specific second grade classroom, second how a subtraction test could be made and last what subtraction strategies and knowlege the students showed. For finding out how the education was held, the class was observed two weeks during math lessons, were the teachers held passes by the board and many different subtraction strategies was shown. For learning how a subtraction test could be made, action research was used and a test was made and tried out. For uncovering the students strategies and knowledge that test and interviews was held. All strategies that was described in the theoretical background was found, but it become clear that it is not o easy to capture students thoguhts in to a few strategy categories and some students answers would not fit.