Environmental literacy needs to be provided to prospective teacher students. The ability to environmental literacy will help future teachers manage environmentally-based learning. The purpose of this research is to describe the forms of environmental literacy teaching and the instruments used to assess the environmental literacy of prospective teacher students. This research is a bibliometric study. A total of 85 pieces of literature were found in the search using the Publish or Perish (PoP) application from 2019 to 2023, and after a literature analysis process, 22 articles were deemed relevant to answer the research questions. The results of this research show that the forms of environmental literacy improvement courses used in higher education are: 1) providing materials followed by real environmental problem-solving projects, 2) providing materials followed by pedagogic projects, 3) project-based learning using microcontroller technology, 4) STEM-oriented learning, and 5) inquiry-based learning. The instruments used include multiple-choice tests, interviews, and questionnaires. Environmental literacy improvement-oriented learning is widely applied to students majoring in elementary education, science education, and biology education.