Helena had pulled the same trick in the past. However, back then, Sylas was still inexperienced, so the teachers didn't come all at once as they did now.
When one subject ended, the next teacher would come, and when that subject was over, another teacher would follow. In terms of schedule, it was more relaxed compared to now, but the overall class time was much longer.
Moreover, all the lessons were taught in a Spartan manner, so he would be exhausted by the time the lessons ended.
'It took me a full year to learn everything.'
Helena's intention to make Sylas suffer was successful. However, not everything went smoothly according to her plans.
If he were still an immature child, it might have worked, but Sylas had already tasted the harshness of life once. Plus, he had gone through the hellish college entrance exams and repeated them in his past life.