Co-Teaching Lesson Planning: How to Plan Instruction When Two Teachers Share a Classroom

Co-teaching has enormous potential. Two educators in a classroom, with the right planning, can provide dramatically differentiated support, smaller effective group sizes, and more responsive instruction than either could provide alone. The problem is that most co-teaching defaults into one teacher teaching while the other watches, grades papers, or manages behavior in the back. That's not co-teaching — it's an aide arrangement.

Effective co-teaching requires explicit lesson planning that assigns both teachers active, purposeful roles from the start of the lesson to the end.

The Six Co-Teaching Models

Before planning, both teachers should have a shared language for the models they're using. The most common frameworks identify six approaches:

1. One teach, one observe: One teacher leads while the other collects specific observational data on student learning
2. One teach, one assist: One teacher leads while the other provides quiet support — best used sparingly, not as a default
3. Station teaching: Students rotate through stations led by each teacher plus an independent station
4. Parallel teaching: Both teachers deliver the same instruction to split halves of the class simultaneously
5. Alternative teaching: One teacher works with a small group needing reteaching or extension while the other works with the majority
6. Team teaching: Both teachers co-lead instruction simultaneously, building on each other's thinking

Planning for co-teaching means specifying which model you're using and when — and then assigning specific actions to each teacher within that model.

Plan Roles in the Document Itself

The single most important improvement most co-teaching pairs can make to their planning is writing both roles explicitly in the lesson plan. Not "Teacher 1 leads, Teacher 2 supports" — but specific actions:

• "Teacher 1 delivers mini-lesson. Teacher 2 circulates and notes which students are not following along."
• "Teacher 1 works with reading group A on vocabulary. Teacher 2 works with reading group B on fluency. Group C completes independent practice."
• "Teacher 1 introduces the concept. Teacher 2 models the think-aloud, narrating thinking while Teacher 1 writes the steps on the board."

When both roles are specific and planned, both teachers arrive prepared to teach rather than waiting to see what's needed.

Prevent the Aide Default

The one-teach-one-assist model is often used as a default when there's no time to plan anything more elaborate. The result is that the second teacher assists — which usually means walking around quietly, answering individual student questions, and managing behavior.

This wastes the second teacher's expertise. Whenever possible, plan for models that use both teachers' instructional capacity: station teaching, parallel teaching, alternative teaching, or team teaching.

Reserve one-teach-one-assist for moments when observational data collection has genuine purpose — not as the default when you couldn't find time to plan.

Plan the Communication

Co-teaching requires communication that individual teaching doesn't. In the lesson plan, build in:

• A brief check-in before class (5 minutes — where are we starting, who's doing what)
• A signal for when the other teacher wants to jump in
• A protocol for redirecting when the lesson isn't going as planned

Without these, two teachers can give contradictory directions, talk over each other, or create confusion for students about who's actually running the class.

Plan for the Students You Actually Have

In most co-taught classrooms, some students receive special education services through the co-teaching model. The special education teacher's expertise in the room should shape lesson design — not just delivery.

In planning, specifically address:

• Which students need modified tasks, and what those modifications look like
• Which students need alternative representations of the content
• Which groups benefit most from small-group instruction with the special education teacher, and when that happens

Next Step

For your next co-taught lesson, write both teachers' specific actions in the plan — not just "Teacher 2 supports" but what exactly Teacher 2 is doing, with which students, during which part of the lesson. Then review those roles with your co-teacher before class and adjust together.