Inclusive education has emerged as a cornerstone of quality education in the 21st century. An inclusive classroom is one where diversity is respected, differences are celebrated, and every learner—irrespective of ability, gender, socio -economic background, language, or learning style— feels valued. The teacher plays a pivotal role as the architect of classroom climate and the primary facilitator of inclusion. The present paper examines the concept of inclusive classroom climate with special emphasis on teacher behaviour and interaction patterns. It differentiates between physical and psychological dimensions of classroom climate and discusses how inclusive practices contribute to student engagement and academic achievement. The study also analyses the Ned Flanders Interaction Analysis Category System (FIAC) as a tool for understanding teacher–student verbal interaction and its impact on inclusivity. Further, the paper explores strategies for creating an interactive classroom environment, particularly in science education, through innovative and experiential teaching methods. The findings highlight that positive teacher behaviour, democratic interaction, and student-centred pedagogy are essential for building an inclusive and interactive classroom climate. It concludes that other than the physical environment a psychological and emotional ecosystem facilitated by a teacher’s behaviour constructs an inclusive classroom. An authoritatrian teachers attitude creates a dictatorial environment while a leaner oriented teacher promote a collaborative and democratic classroom. Analysis of FIAC highlights the role of direct and indirect behaviour of teacher in creating a barrier free, diverse and participatory learning environment. It advocates promoting indirect teacher behaviour along with direct teaching methods – which is central to inclusivity.