Portable whiteboard is a very practical tool in classroom teaching. It is lightweight and easy to carry, and can be moved around the classroom at any time, or fixed on walls or brackets for use. The surface of the whiteboard is smooth, suitable for writing with a whiteboard pen, and the handwriting is clear, easy to erase, and convenient for repeated use. During the teaching process, portable whiteboards can be used to display teaching content, highlight key knowledge on the board, draw graphics, or conduct problem-solving demonstrations. It not only helps teachers explain complex concepts more intuitively, but also encourages students to participate in interaction and express their ideas through writing and drawing.