Taking a three-hour calculus I class at night from 6 to 8:45 can be challenging, primarily due to individual differences in alertness and mental endurance. Many participants highlight that the effectiveness of such a schedule largely depends on one's body clock, with evening classes generally being easier for those who are more active at that time. A common concern is managing hunger and potential sleepiness after dinner, suggesting that a light meal before class can help maintain focus. Long lectures can lead to difficulties in comprehension, especially if confusion arises early in the session, making it hard to follow along later. Some students prefer shorter, one-hour classes for math due to the intensive mental stamina required. However, others report success with evening classes, benefiting from the time available to study before tests and the opportunity to form study groups. Ultimately, personal habits and preferences play a significant role in determining whether this schedule will work effectively for any individual.