Multiple external representations (MERs) are useful for teaching complex content in science education. An open question is whether there is an especially effective way to sequence MERs. On the one hand, the so-called concreteness fading approach suggests starting instruction with more concrete representations and proceeding stepwise to more…

In 2017, the Department of Biology at Virginia Wesleyan University modified its two-course introductory sequence in response to high DFW rates (>50% scoring a D, F, or withdrawing) in the first semester. The revised curriculum created a new third course and moved content that many students struggled with from the first semester to the third…

One way to reduce the cognitive load students feel during instruction is to change the way content is delivered. This can be achieved by optimising the instructional sequence and providing sufficient instructional support during problem-solving. However, the literature is unclear regarding whether an inductive or a deductive instructional sequence…