If I see that you are trying your best and are not intentionally speaking in English, you will earn a 10/10 for the day. If I hear you speaking some English intentionally, an 8/10 is earned. If I hear a lot of English from you during the class period or I can tell that you are not even trying to speak Spanish, a 6/10 is earned.
The goal of the Spanish-only days is to provide an environment for you to listen, speak, and think in Spanish. That is why it is so important that you try to keep the entire day in Spanish and not revert to English when conversation gets tough. You'll be given a list of helpful phrases on day 1 to help you out, and there is even a phrase that asks for permission to express yourself in English for a moment if needed. :)
We will start with just 1 "Día de español" each week but by the end of the school year, our goal will be to have 3 Spanish-only days each week. I am looking forward to these "Días de Español" with you!