Chairperson, Graduate Committee: Greg FrancisHill, Michael Frederick2022-07-082022-07-082021https://scholarworks.montana.edu/handle/1/16492In order for students to achieve a high level of knowledge, teachers and students should be able to identify areas of understanding and areas that need improvement. Designing a progression that identifies concepts help guide teachers and students through the learning process. Students have the opportunity to show mastery in a concept before progressing to the next level. This action research provided students with a progression to guide their learning. Students reflected on each concept before moving to the next. As a result, students were able to show significant growth as well a sense of confidence in learning.enEarth sciencesEnvironmental sciencesHigh school studentsMastery learningConcept learningWeb-based instructionProfessional PaperCopyright 2021 by Michael Frederick Hill