The document summarizes key points about international assessments of student learning and 21st century skills. It discusses how assessments are shifting from multiple choice tests of facts to performance tasks that require problem-solving, critical thinking, and applying knowledge in new contexts. High-achieving countries increasingly use methods like projects, essays, and portfolios to evaluate applied learning alongside subject knowledge. The document advocates for assessment systems that align standards, curriculum, and instruction with clear learning goals like 21st century skills; use multiple sources of evidence including teacher-developed and externally-developed measures; and embody high expectations for all students.