Structural Flexibility (Fixed vs. Open)

Structural flexibility is a concept employed in flexible learning, which is a measure of what level of control the learners have during the instruction. Allowing for open flexibility lets the learners decide when, where, and how they learn in order to fit in with their schedules and lifestyles. Fixed learning does not account for this, forcing the learners to adhere to the class schedule.

Source: https://www.heacademy.ac.uk/workstreams-research/themes/flexible-learning