With a variable ball speed, the tutor was pitching balls to me at a slow 10 mph all the way up to a very quick 85 mph. The ball delivery settings can send you a ball every 1.5 seconds or every 10 seconds. It's all up to you. You can even adjust the spin, both topspin and underspin with the spin control knob on the tennis tutor.The advanced control panel on the tutor plus makes all of these adjustments a simple no brainer. Just set it and forget it until you want a change. utor 補習 數學補習 A Single-To-A Person Tuition So that you believe 1-to-a single is the perfect? Understandably you think that it needs to be since it is normally essentially the most high priced! In Singapore, having tuition is part and parcel of almost every student's life. According to a Sunday Times poll in 2008, 97% of students in Singapore had some form of tuition, be it home tuition, tuition centres or student care centres. According to the Department of Statistics, the tuition industry is worth $820m in 2008, up from $470m in 1998.We shall look at the contributing factors on what drives the tuition industry to such heights, the recipients of tuition and the popularity of tuition centres and home tuition, at greater detail in this article.