Students who enroll in a course after the first day of class may have registered for Idea Machine late, and therefore, may also receive challenges late.
Or the Idea Machine challenges may have gone to a student's spam folder, and the student didn't see the challenge until after the due date.
Regardless, Idea Machine (the web app itself) allows for students to respond to challenges beyond the due date. However, students may want to check with their instructor about submitting responses after the due date.
Contact: Learning Lab