This is one of the most important things in education. Sometimes a completely opposite strategy is required. For example, if students want to learn, you can give them necessary resources and let them study at their own speed. If students don't want to learn, using this strategy they would learn nothing. Similarly, if students want to learn, it is good to have a debate about the topic. If they don't want to learn, they will only use the debate to waste time.

We could separate the students who want to learn from those who don't, and use different strategies for these groups. Problem is, how to separate them. If you ask students, some students will mistakenly believe they want to learn (for example, they would say they want to learn about computer science, when in reality they only enjoy playing computer games). Some of them will lie to make a good impression; or their parents will make them lie.

A possible approach would be to use some costly signalling. For example, to offer "advanced lessons" for volunteers in the afternoon, and later separate the students who participated in these advanced lessons. But this will only work once; when your method becomes known, again, even people without interest in the topic will "volunteer" for the advanced lessons.