Science teaching does not mean passing on information only but is concerned with developing analytical, critical observation and problem solving abilities as well as the creativity of an individual. These abilities are less developed through traditional approach because in traditional approach practical and productive work does not find a prominent place. Many research studies have been done concerning pupils achievement and performance. But very few researches have been made regarding process skill and achievement in the field of biology and this prompted the researcher to take up the present study of impact of laboratory approach on process skills and achievement.