There are many instructional design models and theories, but the most well-known is the Information Processing Theory. Proponents of this theory believe that humans learn best when information is presented in a way that is organized and easy to understand.

One of the main tenets of the Information Processing Theory is that humans are logical thinkers. This means that they are able to organize information and make sense of it. In order to help students learn, then, instructors should present information in a way that is easy to understand and organized.

Another important concept in the Information Processing Theory is the stimulus/response relationship. This says that when a stimulus is presented to a person, their body will react in a certain way. This reaction is based on the information that was presented.

Some other key concepts in the Information Processing Theory include the encoding/decoding model and the processing speed theory. The encoding/decoding model says that the more information a person has to decode, the slower their processing speed will be. The processing speed theory says that the faster a person can process information, the better their chances of learning it.

Overall, the Information Processing Theory is a theory about how humans learn. It says that instructors should present information in a way that is easy to understand and organized, and that the faster a person can process information, the better their chances of learning it.