This math chapter workbook on "Lines and Surfaces," includes explaining straight lines, curved lines, and distinguishing between the two. The teacher should introduce surfaces by discussing flat surfaces, such as those found on sheets of paper, and relate them to shapes like rectangles, squares, and circles. The concept of edges and corners can be introduced, emphasizing how lines come together to form these aspects on surfaces. Incorporating simple activities like identifying lines and surfaces in the classroom will help solidify these geometric concepts.