When selecting a classroom interactive whiteboard, key features include responsive touch functionality, collaboration tools for group learning, compatibility with educational software, multimedia support, device connectivity, durability, and overall ease of use. These features help create an engaging and interactive learning environment for both teachers and students. In my opinion, the most important factor is ease of use, because if the whiteboard is simple and intuitive to operate, it naturally improves teaching efficiency and student engagement. While touch response and collaboration tools enhance interaction, they are most effective only when the system is easy to use, making usability the most critical factor for better learning outcomes.