This study is focused on the development, implementation and evaluation of an environmental education programme for secondary education students. The programme was entitled: 'The effect of fire on the soil system' and it was implemented during the school period of 2008. Twenty-four (24) students (aged from 15-20) coming from Lidoriki Secondary School (Central Greece) participated in the programme, which was based in Project Method. The program consisted of one theoretical part (achievement of cognitive and affective goals) and one experimental part (achievement of cognitive and psychomotor goals). Initial, formative and summative assessment were implemented during the course of the programme, by means of questionnaire, observation students' teamwork and examination of their work sheets. The questionnaire analysis highlighted students' misconceptions regarding the subject, revealed positive changes in students' attitudes as a result of their participation in the programme, as well as satisfactory results concerning the acquired knowledge and skills. The experimental results were of significant scientific and educational value.