Earth science courses typically include the concept of geological time. The authors of this study attempt to move past traditional assessment practices and develop a formative assessment of students' understanding of the construction of the geologic time scale and how it is interpreted. Through this approach students are challenged to conceptualize the geologic time scale by comparing it to a student-produced time scale for an older adult's life. This formative assessment allows the teacher to alter instruction based on students' feedback in order to maximize student understanding of geologic time.

Summary

Subject keyword(s)	Astronomy, Cognitive gains, Earth science, Education, Education (General), Educational theory and practice, Evaluation data reporting, Geologic time, Geology, Geoscience, Physical sciences, Space Science, Space sciences, Teaching practices
Grade level	Higher Education, Vocational/Professional Development Education
Intended audience	Educator
Resource type	Reference Material, Text
Resource format	text, text/html
Rights	We encourage the reuse and dissemination of the material on this site for educational, noncommercial purposes as long as attribution is retained.

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