Before running a lesson with your class, you can preview it from the student perspective to see exactly what they'll experience.
To try a lesson as a student:
Open your lesson and click Try as a Student in the upper-right corner.
Copy the pin code and enter it on the student screen, then enter your name.
Advance through the lesson on the classroom screen. When you reach an activity, start it and complete it as a student would.
Continue through the rest of the lesson.