The Gay, Lesbian and Straight Education Network (GLSEN) National School Climate Survey is the flagship report on the school experiences of lesbian, gay, bisexual, transgender, and queer (LGBTQ) youth in schools, including the extent of the challenges that they face at school and the school-based resources that support LGBTQ students' well-being. The survey has consistently indicated that specific school-based supports are related to a safer and more inclusive school climate, including: supportive educators, LGBTQ-inclusive curriculum, inclusive and supportive policies, and supportive student clubs, such as Gay-Straight Alliances or Gender and Sexuality Alliances (GSAs). The full GLSEN "2019 National School Climate Survey" includes information on LGBTQ middle and high school students' experiences, including: (1) Hearing biased language, from both students and educators; (2) Experiences of harassment and assault; (3) Anti-LGBTQ discrimination; (4) Effects of a hostile school climate on educational outcomes and psychological well-being; and (5) The availability and utility of supportive school resources. In addition this report examines whether students report these experiences to school officials or their families, and how these adults addressed the problem. Further, this report examines the impact of a hostile school climate on LGBTQ students' academic achievement, educational aspirations, and psychological well-being. The report also examines how the school experiences of LGBTQ students vary by personal and community characteristics. [For the 2019 full report, see ED608534. For "The 2017 National School Climate Survey: The Experiences of Lesbian, Gay, Bisexual, Transgender, and Queer Youth in Our Nation's Schools," see ED590243.]