What Is Dual Coding?
Dual coding is combining words and visuals such as pictures, diagrams and graphic. The idea is to provide two different representations of the information, both visual and verbal, to help students understand the information better.
Adding visuals to a verbal description can make the presented ideas more concrete, and provides two ways of understanding the presented ideas. Dual coding is about more than just adding pictures. Instead, the visuals should be meaningful, and students should have enough time to integrate the two representations.
There is scientific evidence backing dual coding, showing that when we combine representations it is easier for students to learn and understand the material.