Profesor Valverde runs an awesome class!! It's extremely relaxed and very casual, but you still learn really interesting stuff! He doesn't use powerpoints which can be tough sometimes because he will go on tangents and you won't be sure whether or not it's important or not, but before every test he goes over possible test questions which is very helpful. Generally, make sure to participate, that's the one thing that got me with my grade, but other than that it is very easy to get an A as long as you pay attention. Profesor Valverde is also extremely understanding and kind, I joined his class super late and I still managed very well!