Forskning visar att motivation är betydelsefullt för elevers inlärningsprocess och skolresultat. Med detta som utgångspunkt är syftet med denna underesökning att undersöka vilka orsaker som finns till bristande motivation hos eleverna i samband med modersmålsundervisningen samt vad lärare kan göra för att höja elevernas motivation i deltagandet av modrsmålsundervisningen. Denna kvalitativa studie utgår från sju intervjuer. Tre intervjuer av modersmålslärare och sju intervjuer med elever i högstadiet. Ur intervjuerna med lärare och elever framkom att de faktorer som påverkade elevens motivation var klassrumsklimat, schemat, relationer till omgivningen, gruppindelning och samarbetet mellan modersmålsläraren med övriga lärare inom andra skolämne. / Research has shown that motivation is of great importance for the individual student's learning process and school results. The purpose of the degree project is to investigate the causes of lack of motivation in students who participate in mother tongue teaching and what teachers can do to stimulate this lack of motivation. In a qualitative study, a number of interviews were conducted. On the one hand, three mother tongue teachers in the subjects Arabic, Dari and Polish were interviewed, and on the other hand students from year 6 to year 9. The interviews asked questions about what perceptions students have about their mother tongue, what teachers can do about lack of motivation and what framework factors effect teachers' attitudes. To learn the mother tongue. The results showed that students lack of motivation was due to various factors, including lack of time, work environment, less inclusion of the mother tongue subject, mother tongue teachers relätionship to teachers in other school subject. The conclusion we reached showed the mother tongue subject's role in the diversity ofh the school community, by strengthening the student's identity and personality, and we found som tips on measures for lack of motivation among students and teachers for the subject's mother tongue.