This study is based on the concept that an in-service training program can help teachers to better understand the importance of
using laboratory work to teach science and thus, improve the level of performance of their students. The study was conducted by
the facilitators before and after a five day training workshop and sought to understand the teachers’ perceptions of and
experiences with the aims of laboratory work and its importance in the teaching of Biology and Chemistry subjects. Seventeen
secondary school teachers from both subjects were involved in the study. Overall, the findings of this study suggested that the
teachers improved their level of understanding of the importance of using laboratory work to teach Biology and Chemistry
subjects after attending a training workshop. Teachers recognize the value placed on laboratory work to familiarize students with
the practical component; however, they feel that the lack of well equipped laboratories, in most of their schools, is a great barrier
for them to conduct laboratory work of any kind in their classes. Teachers complained about the length of the Biology and
Chemistry syllabuses and recommend a thorough revision if the Ministry of Education wants them to conduct laboratory work in
theirclasses and hence, comply with itsaims. The fact that most of the teachers during their initial training did not have
laboratory work effectively resulted in the fragility and fear to use any kind of laboratory work. Therefore, the schools are urged
to organize ongoing professional development programs that meet the teachers’ specific needs.