Today my Year 8s used lollies and toothpicks to model elements, molecules, compounds and mixtures. This isn’t anything new. Lots of teachers and students have done this before. However, I decide to allow students to film themselves explaining how the lolly models they made represent elements, molecules, compounds and mixtures as evidence of learning. For one group, I decided to record a question-and-answer conversation on my iPad.
The video showed that this student understood to a certain extent how particles are arranged in elements, molecules, compounds and mixtures. The student did accurately use the lollies for this, but upon questioning, she was confused about how many different types of particles made up her lolly models of compounds and mixtures.
I’d like this type of evidence of learning to be prominent in schools. As a system I think we rely too heavily on written exams and assignments to elicit student understanding of concepts. Having videos such as the one shown above is much more powerful to give feedback to students and to use as evidence of learning. Eventually I’d like each of teacher in my faculty to a collection of videos like this for professional discussions on our students’ learning.