Under our policies we do not offer any cover for events and our policy is not designed to offer any blanket events cover.
If you are actively coaching a performance, then you would be covered for this, but it's important to note that your students are not directly covered by the policy. It is covering you as the coach should an injury be suffered by a third-party or if third-party property is damaged, and you as the coach were found negligent in causing this.
If your students wished to be directly covered for participating in a sport, they can always purchase a separate player's or participant's policy.