It is certainly important for the Swedish school to prepare students for the adult world. It iscertainty a priority according to our curriculum, once students graduate, they should behaving democratic principles which includes an understanding and respecting all humankind, regardless of ethnicity, religion, and sexuality. For this to be achieved, the Swedish teachingin schools must incorporate teaching contents which allows students to understand socialstructures and norms that underlies in society that causes inequality. Such contents should bemore about racism, sexism and for this research primarily focus, homophobia. Often within subjects, LGBT+ has been invisible in Swedish teaching which causes students to be rather ignorant to their surroundings. Therefore, it is crucial and necessary to teach especially in the subject history for upper secondary schools. Hence, the fact that history contributes to shaping students’ identity. Thus, this research investigates how history teachers includes the LGBTQ+ in their history teaching. It is also in this study’s interest to analyze how heteronormativity underlies in teachers teaching ability in relation to history teaching. To research this matter, the method for this study is a qualitive method which has collected data in form of interviews from seven different teachers and different schools. The chosen theory was queer theory as the study primarily focuses on how sexuality is conceptualized and understood by teachers aswell as their reflection on heteronormativity. The result of the findings was that none of the teachers had taught about LGBTQ+ in history but simultaneously showed a great amount of interest in doing so near the future. However, the teachers expressed some uncertainty in how LGBTQ+ could be taught in a more practical sense. According to the teachers, this uncertainty that was an obstacle they needed to overcome, had many factors. Among the factors were that the teachers were uneducated in the history of LGBTQ+, time seemed to be against them and there are no proper teaching materials which the teachers can confine in. This gap has also caused teachers to be unprepared for conflicts in the classroom related toLGBTIQ+-questions. This finding shows that both the academic world along with the teaching programs must educate teacher students about such important matters for them to be prepared once their careers begin.