To increase classroom participation and student interest, teachers can apply operant conditioning by using positive reinforcement, negative reinforcement, and positive punishment. This includes congratulating students for proper answers in class, making participation a key part of their grades, and setting group assignments during class time. Negative reinforcement can also be used to encourage students to complete their assignments on time, while positive punishment can be applied by requiring students who fail to complete homework to sit in class and do the work before being released. The operant theory has its strengths, including ease of application and temporary effects on behavior, but it may have limitations such as being too simplistic or having only temporary effects.