Transforming equity in Microbiology education through Alternative Grading

Microbiology students are expected to demonstrate more than knowledge: they must develop laboratory competence, scientific reasoning, data interpretation, communication, and professional practice. Yet conventional grading often compresses these diverse outcomes into accumulated points and averaged scores. Alternative grading (AG) offers a different approach by emphasizing clearly defined learning outcomes, demonstrated proficiency, meaningful feedback, reassessment, and reflection. This perspective examines five approaches, standards-based grading, mastery-based grading, specifications grading, contract grading, and ungrading, and how they could apply to microbiology education. Evidence from biology, biochemistry, chemistry, and related STEM disciplines suggests that these approaches can clarify expectations, create opportunities for students to learn from feedback and reassessment, and support engagement and learning. However, direct evidence from microbiology remains limited. Here, a pragmatic, evidence-based approach is proposed that matches AG strategies to the learning task outcomes: mastery and specifications grading for clearly defined knowledge and laboratory competencies, and feedback-rich approaches such as ungrading for research, reflection, and scientific communication. Rather than replacing conventional grading, AG can be introduced selectively and evaluated for its effects on learning, student experience, equity, feasibility, and instructor workload. This approach gives microbiology educators an opportunity to shift assessment emphasis from accumulating points to demonstrating knowledge, skills, scientific reasoning, and growth.