For Monday:

• IMPORTANT TO DO:  Watch this YouTube video I made:  Modular Arithmetic User’s Manual (9:23).  This is part of the course lecture material, in flipped form.
• To Do:  Here’s a follow-up worksheet to do and hand in on canvas’s daily dropbox.
• To Do (time permitting):  Think about how to finish off the proof from Friday’s class; I’ll finish it up on Monday.
• To Know:  There’s a proof quiz due Monday on canvas.
• To Know:  The DeLong Lectures are next week.