Elementary teachers can use a 3-D approach (direct, divide, and diversity) to classroom instruction and management to teach concept-based lessons. Initially the teacher will "direct" an interactive learning process by diagnosing student needs and modifying subsequent learning tasks through the analysis of student feedback. On the basis of the diagnosis and feedback, the teacher will "divide" the children into an instructional group with which he/she will work directly. The remainder of the students will work independently. These students must select and complete activities that emerge from the third part of the approach, "diversity." The notion of diversity implies creative classroom instruction and management. The first sample lesson is designed to help children understand the concept of city, through processes such as comparing, analyzing, evaluating, generalizing, and direct involvement. The second lesson on community development introduces students to the people who populated the American city from 1865 to 1910. Provided for each sample lesson are an overview, objectives, the focusing event, and the engagement activity. (RM)