It’s natural to believe that if we focus on the material in a sequential manner until we’ve mastered it, that our brain will be able to retrieve the information easier. That’s called blocked study. The material is learned in blocks or sets, and it works for immediate recall. Like this –
However, the research shows that we strengthen our mind’s ability to recall the information if we mix up the information by asking our brains to work harder to make connections. So take a quick look at the process of Interleaved Learning (1:38).
Our brains work harder, when we mix up different concepts in the subject area. That work results in improved mental connections. If you want to know more listen to Interleaving (4:16) Strategies for Improved Learning from the Learning Initiative at the University of Arizona.