In MCPS, students are supposed to have both social studies and science, but often these subjects are lost to increased time for Math and ELA. It is not uncommon for any instruction called science or social studies to actually be an ELA lesson using a reading about science or social studies topics. As a result, ES students are unlikely to learn any methodology in those content areas and they retain very little content knowledge, including vocabulary.
Your ES child should learn, at minimum, what is covered in the grade band standards established by the NCSS (
https://www.socialstudies.org/standards/national-curriculum-standards-social-studies-introduction) and the NGSS (
https://www.nextgenscience.org/content/home-page). You can purchase materials that are marketed to address these standards.
—MCPS 6th grade teacher.