Back in 2011 Robert Harrell offered this advice:
One of the things we are supposed to do each day is write down a goal and agenda for every class every day. The goal is supposed to be in the form of “Students will be able to” (SWBAT). The idea is that if students know the purpose of the class period, they will more readily get the knowledge. So, I did an experiment. Just off the cuff, I asked my students if they could tell a visitor the purpose of the class period. Response: “Communicate in German.” What’s the agenda? “Watch, listen and respond in German.” Works for me – I’ve fulfilled the requirement, and my students know what the lesson is about.