STEM challenges in assessment scale: A content validity study for prospective teachers’ readiness in sustainable STEM educationYurizka Melia Sari, Yuli Izza El Milla, Shofan Fiangga, Fikky Dian Roqobih, Abdul Haris Rosyidi and Masitah ShahrillE3S Web Conf., 640 (2025) 02008DOI: https://doi.org/10.1051/e3sconf/202564002008