Concept Development is important because it forces the teacher to have a very clear understanding and definition of what is being taught, and it provides a written reference for students, especially English Learners. Concept Development is important so students can generalize new situations in school and real life. Students need a good foundation at the conceptual level so they can apply the concepts they have learned to new situations. For example, students can calculate how much paint is needed to paint a wall because they immediately recognize that this involves determining area. Concept Development is important so students can internalize the generalization as opposed to learning individual instances. For example, teach the rule that Days of the Week are always capitalized. This is a general rule that students can apply to any day of the week instead of individual days being taught separately.