It needs to be once a week. Once a week, this frequency can ensure that students have enough time to study and review independently within a week, and also ensure that students have enough time to digest and absorb during the learning process. The frequency of weekly lectures can also help students establish stable study habits and improve learning efficiency and effectiveness. Wheat Teaching Assistant is an online education platform, which provides a variety of courses and learning resources, including Chinese, mathematics, English and other subjects. Wheat teaching assistants pointed out that students choose the courses they need to study on the platform, and make appointments and purchases.