Chairperson, Graduate Committee: C. John GravesPatton, Jessica A.2023-07-312023-07-312022https://scholarworks.montana.edu/handle/1/17490The implementation of this action research focused on students' ability to write scientific explanations after science investigations. This research was conducted in a 6th grade Earth Science classroom in the spring of 2022. Prior to the research, I noticed students struggling with written reflections and explanations of the science concepts. Prior to the treatment, students' reflections were unclear, and connections to the science concepts were missing or incomplete. I implemented the instruction of the CER (claim, evidence, reasoning) framework to help improve my students' scientific reasoning skills and confidence while writing scientific explanations. The results showed overall improvements in students' ability to write scientific explanations and use evidence in their writing. It was concluded that the implementation of the CER framework positively impacted students' writing abilities in the classroom.enEarth sciencesMiddle school studentsCritical thinkingScience--MethodologyWritingProfessional PaperCopyright 2022 by Jessica A. Patton