Let students know from the first day that we value ideas. Ask questions every day for which we do not have specific answers in mind. Seek ideas across all academic areas as well as to address social and logistics issues.
Science and math - How would you model this concept?
Engineering - What would you design to get this task done?
Math - What other ways could this be solved?
Social studies - What do you want to know more about? How could you find out about that?
Reading and writing - What do you like and dislike about this book? How would you change it? What ideas are you getting for your own writing?
Social - How can we make people feel safe sharing new ideas?
Logistics - How can we come up with space, time, and materials for this project?