This paper discusses the results of a study to assess the awareness levels of the secondary school teachers on the indoor air pollution knowledge. The aim of the study is to gauge the Malaysia secondary students on their knowledge, awareness, understanding of the environment and air pollution. Data were gathered sample size of 373 respondents from selected schools in Ipoh City, in the state of Perak, Malaysia. The data were analyzed by using statistical analyses by using SPSS to obtained a better understanding of the trend of the data. The key results show that 76.6 % of the school teachers have a knowledge of indoor air pollution. The study also shows that 73.7 % of the respondents agree that contaminated indoor air contributes to the health effects. The study shows that the teachers in Malaysia already have basic knowledge of air pollution and environmental issues.