Use of dual codes for teaching school students: A short note

Combining written or text codes (like instructions) with visual codes (such as symbols, diagrams, images, flowcharts, or icons) is an effective teaching method called "dual coding." This method activates different areas of the brain at the same time—the verbal and visual systems—to enhance learning results. Research shows that dual-coded teaching improves understanding of concepts because visuals simplify complex topics, like scientific processes, math formulas, or historical timelines,into smaller parts. It also boosts memory and long-term retention.

Dual-coded teaching lessens the cognitive load on students and increases their engagement and interest, as many students are visual-verbal learners. This approach also accommodates diverse learners and supports children with dysgraphia, as visuals offer essential scaffolding for students with learning disabilities, younger students, or those whose home language differs from the school language. There is evidence that pairing text with visuals helps students independently understand new words or instructions, overcoming language barriers and promoting inclusion in the classroom.