Teachers, educators, and instructional designers must understand different teaching methodologies and theories to design and develop a curriculum that can motivate students. This is necessary because the diverse cultural approach to learning has changed, and there is more of a global market with online learning. Many theories have been developed to map different learning styles and intelligence, which are helpful for instructors and instructional designers. It is essential to look at a theory, analyze its usefulness, and determine how it can be used in the instructional design so that information can be adjusted to include key motivational aspects of learning. This chapter will contain information on the meaning of theory, why it is necessary to understand it, and a description of a phenomenon that reflects a theory. The authors also look at scaffolding, multiple intelligence, problem, and project-based approaches to learning, collaboration, motivational gaming, and learning models.