A teacher, keeping in mind the background and abilities of each learner,…

Concept: Effective, learner-centered pedagogy rests on the principle of differentiated instruction: because learners differ across multiple dimensions — prior background, ability level, and pace — a teacher must adapt how a lesson is designed to those dimensions rather than deliver one fixed method to everyone. Structuring problem-solving as a collaborative task is a learner-centered strategy that can be layered onto such a differentiated design, letting learners build understanding through guided peer interaction.

Application: In this lesson, the teacher explicitly designs around each learner's background and abilities — the core dimensions of differentiation — and additionally structures the task as collaborative problem-solving, a learner-centered strategy that supports that differentiated design. Basing the lesson on multiple learner-specific factors, background and ability, is a direct instance of differentiating instruction.

Contrast:

• Uniform instruction for all students delivers the same content, pace, and method to every learner regardless of background or ability, which is the opposite of adapting to individual differences.

• Relying only on the student's self-ability leaves learners to progress unaided, without teacher-planned differentiation or a structured collaborative task.

• Giving special attention to environmental resources centers the lesson on physical or material resources rather than on learners' background or ability differences.

Cross-check: The stem's central cue — attention to each learner's background and abilities — points to multiple learner-specific factors being addressed, and the collaborative problem-solving format is consistent with, though not itself the definition of, that differentiated design, confirming differentiation based on multi-dimensional learning factors as the demonstrated principle.