>Once your Day of Silence event is over make sure that you assess how it went. There are a variety of ways to ask people who participated how it went for them, from having a survey, to having a conversation. You can even do both.
Having a conversation allows people to tell their story in detail. Administering a survey allows you to collect quantitative data. The latter can be good for your school administrators. Both options can help you build upon your DOS activities for next year.
Here is a sample Day of Silence evaluation - download PDF here (1 page).