An assessment is an assignment, project, or classroom activity that helps a teacher understand, measure, and evaluate a student's progress. Traditionally, the word "assessment" makes a one think of quizzes, tests, or exams. However, as we enter a new era of teaching and learning, assessments have become multi-modal and differentiated. 

21st century assessments can engage students by acknowledging their preferred means of communication or pushing them out of their comfort zone. 21st century assessments can vary in content (subject matter), process (how students learn), and product (what students produce). Assessments are directly tied to unit goals and learning objectives. 

Examples of 21st century assessments include: digital portfolios, collaborative projects, presentations with multimedia elements, simulations, peer reviews, self-assessments, open-ended questions, case studies, problem-based learning activities, design challenges, and real-world application projects, all designed to evaluate skills like critical thinking, communication, collaboration, creativity, and digital literacy, often utilizing technology to showcase learning in authentic ways. 

Key points about 21st century assessments:

• Focus on skills over rote knowledge:
  They prioritize assessing students' ability to apply knowledge in real-world situations, not just memorizing facts. 

• Authentic tasks:
  Assessments mimic real-world challenges, encouraging students to use various skills to solve problems. 

• Technology integration:
  Utilize digital tools like online platforms, collaborative documents, and multimedia presentations to showcase learning. 

• Formative feedback:
  Provide ongoing feedback to students to guide their learning and improvement. 

• Multiple assessment methods:
  Combine different types of assessments like written work, presentations, performance-based tasks, and self-reflection.