In health education and behavior change interventions, process tracking monitors the delivery of an intervention and its receipt to the intended audience. A randomized controlled trial in the state of Bihar, India was conducted to help school teachers become tobacco free through appropriately designed intervention program and delivery system. We describe the results from process tracking of this intervention delivery. The intervention program was centred on six topics delivered in each school through 12 sessions over 6 successive months. The program deliverers recorded the process measures as total number of sessions and program-components implemented (fidelity); time spent conducting sessions (dose) and proportion of teachers attending at least one session (reach). The outcome measures (teachers' exposure to intervention messages and tobacco policy adoption) were assessed post-intervention. All 12 sessions were delivered in 33 out of 36 schools. Thirty-one schools implemented all six program components. In 18 schools, =95% of the teachers participated in one or more sessions. Thirty-three schools received 12 or more hours of dose. In 29 schools, 100% teachers reported exposure to all program messages. Tobacco policy was adopted by all schools. Thus, the intervention was generally delivered as planned and it had a positive impact on teachers and schools.