State and federal laws require public schools to release report cards to the public each year.  The State of South Carolina Department of Education creates and maintains these report cards on their website.  Report cards from 2019 to present-day are located at https://screportcards.com/ and report cards from 2008 to 2018 are located at https://ed.sc.gov/data/report-cards/state-report-cards/

Also available on the State of South Carolina Department of Education website is test scores for state and national assessments, found at https://ed.sc.gov/data/test-scores/.