A lesson plan involving LGBT issues will look differently depending on the subject of the class and the student's grade level. In a high school Social Studies class, students might encounter content relating to the history of the issue. A Science class would approach it differently; they might explore the difference between genets and brain structure. A literature class (which is what I teach) might read a literary work from someone within the LGBTQ community. In my literature class, I do not teach gender issues, race issues, or any other socio/political issue; I teach reading and writing. I may select a text such as Letter from Birmingham jail or a work of fiction by Ocean Vuong. Schools and teachers select the books students read. These will always be controversial because that is how a society pushes itself and grows. More conservative people shy away from these issues, but the issues and those affected by them are not going away.
LQBTQ students are constantly harassed, maligned, and ridiculed by fellow students--a ten minute Power Point on the topic is not enough to stop one group of students from throwing urine on another student. The world has and will continue to change--teachers prepare young people to live in the world to come, not the world that has been.