A blog post by Richard James Rogers (Award-Winning Author of The Quick Guide to Classroom Management and The Power of Praise: Empowering Students Through Positive Feedback). This blog post has been beautifully illustrated by Pop Sutthiya Lertyongphati.
Accompanying podcast episode:
As educators, we’re always on the lookout for strategies that can enhance our students’ understanding and retention of information. One such strategy that has gained significant attention in recent years is dual coding. But what exactly is dual coding, and how can it be applied in our classrooms to make a tangible difference? Drawing from my own experiences since I started teaching Science and Maths in 2006, let’s dive into the concept and its practical application.
Dual coding in one sentence
Combine good visuals with good verbals, and combine good verbals with good visuals.
Dual coding fundamentals
Dual coding is the process of combining verbal and visual information to improve learning. The idea is simple: when students are presented with both words and images that complement each other, they are more likely to understand and remember the material. This approach taps into the brain’s ability to process visual and verbal information through separate channels, creating a more robust memory trace.
The main thing that educators misunderstand about dual coding is that it’s ‘something we do all the the time as teachers’. But is this really true? How often do we slow down and take the time to pair a good visual with a clear verbal description?
Why dual coding works
From my experience, dual coding works because it leverages the strengths of both visual and verbal memory. When I first started teaching, I noticed that some students struggled to grasp complex concepts through words alone. It wasn’t until I began incorporating diagrams, flowcharts, and other visual aids that I saw a noticeable improvement in their understanding. For instance, explaining the water cycle in a science lesson became much more effective when I paired my explanation with a simple, clear diagram that illustrated the process. In mathematics, verbally describing each stage of a long calculation slowly, as I wrote the steps or delineated schematics, tended to help students understand the operations they had to follow better than if I just wrote the method without commentary.
Dual coding also reduces the cognitive load on students. When information is presented in both visual and verbal formats (and is presented slowly), students don’t have to work as hard to understand the content. This allows them to focus more on processing and retaining the information rather than trying to decode what’s being said or shown. In my maths classes, using visual representations of problems (like number lines or geometric figures) has helped students better understand abstract concepts, leading to more successful problem-solving.
Practical Tips for Using Dual Coding in the Classroom
- Combine Text with Images: Start by integrating simple visuals with your explanations. For example, when teaching trigonometry, pair each formula with a corresponding triangle diagram. This helps students see the connection between the abstract formula and its practical application.
- Use Flowcharts and Diagrams: When covering processes or sequences, such as the steps in solving an algebraic equation, use flowcharts to visually represent each step. This not only helps students follow along but also allows them to see the logical progression of the solution.
- Encourage Students to Create Their Own Visuals: Involve your students in the dual coding process by having them create their own diagrams or sketches. This could be as simple as drawing a quick sketch to represent a concept or creating a more detailed Mind Map® of a topic. I’ve found that when students take ownership of the visuals, their understanding deepens.
My Experience with Dual Coding
One of the most memorable successes I’ve had with dual coding was when teaching a particularly challenging topic in physics: electromagnetic induction. Despite my best efforts to explain it verbally, many students were still confused. I decided to create a step-by-step visual guide that illustrated the process of induction, from the movement of the conductor through the magnetic field to the generation of current. The combination of this visual guide with my verbal explanation transformed the lesson. Students who had previously been disengaged suddenly became more confident, asking questions and even helping their peers understand the concept.
In another instance, while teaching a maths class on probability, I used tree diagrams alongside verbal explanations. The visual representation of different outcomes made the concept much clearer, and students were better able to tackle complex problems involving multiple stages of probability.
Final thoughts
Dual coding is a powerful tool in the educator’s toolkit, one that can make a significant difference in how students process and retain information. By combining verbal explanations with visual aids, we can cater to different learning needs, reduce cognitive load, and make our lessons more engaging and effective.
As I reflect on my teaching journey since 2006, I can confidently say that dual coding has been a game-changer in my classroom. I encourage you to experiment with it in your own teaching practice. The results might just surprise you!
