氣泡排序法雖簡單，但高中學生可能不易了解。本研究提出一套教學方法：利用設計草圖將氣泡排序的抽象概念具體化，評估是否對了解其虛擬碼有幫助。 在武陵高中進行實驗，有250位學生參與，實驗結果的統計分析顯示：設計草圖在氣泡排序之高抽象概念的了解上(如回合數)有顯著幫助；在低抽象概念上 (如比較、交換、回合)，則有妨礙。 Bubble sort is simple. However, it still seems difficult for high school students. This research presents a pedagogical methodology: Using design sketch to visualize the abstract concepts in it, and evaluating the effectiveness of this in assisting the students to understand the pseudo code of it. An experiment is conducted in Wu-Ling senior high school with 250 students participated. The statistical analysis of experimental results shows that, for relatively high abstraction concepts, such as iteration number, design sketch helps significantly. However, it is not the case for those low abstraction concepts such as compare, swap, and iteration.