Co-teaching, where a general education teacher and a special education teacher share responsibility for a classroom including students with a range of needs, is a common structural approach to inclusion. Research on co-teaching consistently finds that the specific model used, and the quality of the working relationship between the two teachers, matters as much as the basic decision to co-teach in the first place.
The commonly identified co-teaching models
Educational researchers, including Marilyn Friend, have identified several distinct co-teaching approaches, including one teacher leading instruction while the other circulates providing individual support; both teachers teaching the same content simultaneously to different smaller groups within the room; one teacher leading while the other teaches a smaller group a modified or supplemental version of the lesson; and both teachers genuinely sharing lead instruction, alternating or truly co-delivering the same content together. Each model suits different purposes, and experienced co-teaching pairs often rotate between them depending on the lesson.
The common pitfall of ‘one teach, one assist’
Research on co-teaching implementation has found that the ‘one teach, one assist’ model, where one teacher consistently leads while the other circulates in a supporting role, is both the most commonly used model in practice and generally the least effective when used as the sole or primary approach. Overreliance on this single model can reduce the special education teacher to a visibly subordinate role, failing to use their specific expertise fully, and can also inadvertently signal to students which teacher holds more authority, undermining the collaborative structure the model is meant to provide.
What makes a co-teaching partnership actually work
Research identifies shared, dedicated planning time as one of the strongest predictors of successful co-teaching, since the two teachers need genuine, regular opportunity to coordinate on lesson design, student needs, and which specific co-teaching model to use for a given lesson. Co-teaching pairs who are given this planning time consistently report considerably more positive experiences and better outcomes than pairs expected to coordinate informally, in hallway conversations or between other responsibilities.
Clear, equal roles in front of students
Students tend to respond to co-teaching more positively, and the model functions more effectively overall, when both teachers are visibly presented as equally authoritative figures in the classroom, both leading instruction, both managing behavior, both known to and trusted by the full class, rather than one teacher being visibly positioned as the primary authority and the other as a helper. This requires deliberate attention from both teachers, since default classroom dynamics can otherwise drift toward an unequal pattern without either teacher fully intending it.
Building an effective co-teaching relationship
- Advocate for genuine shared planning time, since this is consistently linked to better outcomes in the research.
- Rotate deliberately through different co-teaching models rather than defaulting to the same structure every lesson.
- Discuss classroom management and discipline approaches explicitly in advance, so both teachers present a consistent, unified approach to students.
- Revisit and adjust the partnership periodically, since what works well early in a year may need updating as the class and its needs evolve.
Co-teaching as a genuine partnership
Effective co-teaching asks more of both teachers than simply sharing a room; it requires real collaborative planning, flexibility across different models, and a visibly equal partnership in front of students. Where schools invest in the structural support — time, training, thoughtful pairing — that effective co-teaching genuinely requires, the research suggests it can be one of the more effective structural approaches to inclusive education currently available.
Matching the pairing itself
Beyond the specific model used, research also points to the importance of how co-teaching pairs are formed in the first place, with voluntary, well-matched pairings generally outperforming assignments made purely for administrative convenience with little regard for compatible teaching styles or philosophies. Where possible, allowing some teacher input into co-teaching assignments, and providing genuine opportunity to build the working relationship through dedicated collaboration before the partnership begins in the classroom, tends to support a considerably stronger foundation than pairing teachers together at the last minute with no prior working relationship.