What was the significant issue with the teacher's approach to students passing notes during instruction?

The significant issue with the teacher's approach to students passing notes during instruction lies in the disruption it causes to the learning environment. When students are passing notes, it can divert their attention away from the lesson, interrupt the flow of instruction, and distract their peers. This can undermine the effectiveness of teaching and hinder the ability of all students to engage with the material being presented. Maintaining a focused and respectful classroom atmosphere is essential for maximizing student learning, and addressing behavior that disrupts this dynamic is a crucial aspect of effective classroom management.

In contrast, while the options regarding moving students to different desks or applying immediate consequences could also relate to classroom management practices, they do not directly address the immediate impact of note-passing on the instructional moment. Similarly, the collection of notes may raise privacy concerns, but again, the primary issue at hand is the disruption to the flow of teaching and learning.