Teaching isn’t easy, even less so when there are confirmation biases to overcome.
Put simply, confirmation bias is how we tend to look for information that confirms what we already believe and reject what might contradict it. Confirmation bias can affect the classroom on many levels.
Students may have preconceived ideas about the course content. Instructors might creatively bypass this, for instance, by reframing discussion questions, asking a student to present a view that they disagree with rather than their own.
We as instructors may also have preconceived notions about what makes for quality teaching, such as the largely debunked idea of learning styles. We might avoid this by continually ensuring our teaching is actually evidence-based.