I really enjoyed the online lectures on the interior of the Earth! The content was well-structured and provided a clear understanding of the Earth's layers, including the crust, mantle, outer core, and inner core. The use of visuals and animations helped illustrate complex concepts, making them easier to grasp. I appreciated how the lectures incorporated real-world examples and applications of seismic data. However, I think it would be beneficial to include more interactive elements, like polls or discussion prompts, to enhance engagement. Overall, a fantastic series of lectures that deepened my understanding of geology!