A teacher assigns a video lecture for students to watch at home before class, and the next day engages them in hands-on experimental activities. Which approach did she use?

The flipped classroom has students watch the video lecture at home before class and then do hands-on experimental activities in class.

Problem solving is a general instructional strategy of working through problems, not the specific reversal of lecture and practice.

Collaborative learning centres on students working together in groups, which is not what defines this arrangement.

Personalized learning tailors pace and content to each learner, not the home-then-class inversion described.

The flip frees class time for application and interaction under the teacher's guidance.

The model was popularised by Jonathan Bergmann and Aaron Sams in science teaching.