Abstract
The present study is about accuracy in English writing for Norwegian students at the upper secondary school. The thesis will investigate the use of two different agreement markers in the learner texts. The two areas are the subject-verb marker -s and the genitive `s. Different subthemes will also take place in this study to get one or many explanations for why the students make these mistakes. There will be sections where I mention their interlanguage, their beliefs and thoughts regarding the English language.