Marcus teaches fifth grade. in marcus's classroom, learning is individualized and students are responsible for their own learning. we would characterize marcus's classroom as

I believe the answer is: Learner directed

Learner directed classroom refers to the type of classroom that encourage students' habit of self-learning and observation.

Even though this type of method often shows results in slower rate, it would increase the likelihood of the students able to found their own subject of interest since the early age