Yes, online one-on-one English classes with a foreign teacher can be very useful. With a personalized approach, students receive individualized attention, which enables them to learn at their own pace and focus on their specific needs. Also, communicating with a native English speaker helps students develop their listening and speaking skills, learn more about English-speaking cultures, and improve their overall fluency. However, its important to choose a reputable language school or tutoring platform that provides qualified and experienced teachers.