In this activity, students will use an Immediate Feedback Assessment Technique (scratch cards) to answer a series of questions in a two-stage exam. This activity should be a formative exam with little impact on their final grade.
The instructor begins by handing out an “exam” with multiple choice questions relating to kinematics, vectors, and coordinate systems. Unlike most exams, the questions are designed to be somewhat ambiguous in order to promote discussion. Individually, students solve and answer each question to the best of their ability. The final question is a particularly nontrivial question in which three solutions are presented to a problem, each using a different implicit coordinate system. Students must determine which coordinate systems are self-consistent in order to determine which solution(s) are correct, and provide a justification for their response.
Students are divided into groups of 3-4 and handed pre-made scratch cards. In these groups, they discuss their solutions to each problem, coming to a consensus. They use a coin to scratch off the corresponding entries on the scratch card, which reveals whether or not it was the correct answer.
If the students reveal incorrect answers, they attempt the question again until they reveal the correct answer. Students can then be graded in part based on the number of revealed answers on the scratch card at the end.
Students learn to assess and interpret coordinate systems. Students learn that coordinate systems can differ, but must still be internally consistent.
Copyright: © 2023 Dugdale. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication on this website is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.