A 300-hour yoga teacher training is a great way to increase your knowledge base and refine your teaching tools. It builds on the knowledge from the 200-hour certification, and adds greater detail into every limb of the practice.
People often like to stand for something, protest against injustices, campaign for peace etc. But first, we must find truth within. Reacting against exterior situations, when you have not reconciled with yourself, will lead to nothing but violence (on the inside as well as on the outside)