There are often many paths to accomplish the same goal. For actors, it is no different. Some accomplish in an instant what others go through years of formal education (high school drama, colleges, etc.) to achieve. Others are trained from their earliest years to develop the required skills needed to be a prominent actor.
Every acting class functions differently. What remains same is that every class imparts knowledge and makes sure the students have fun while learning. Some classes are arranged formally for theoretical learning with a separate spacing for acting performances. Other acting classes have informal table and chairs scattered around the room to encourage active discussions.