The study investigated the effects of laboratory work and field work practical teaching strategies on academic achievement of senior secondary school biology students. It also investigated the effects of attitude and gender on the measure outcome. A quasi-experiment pre-test post-test control group design was adopted in which treatment (at four levels) was crossed with attitude (at two levels) and gender (at two levels). Sample consisted of 146 SS2 biology (86 males and 60 females) drawn from four intact classes randomly selected from four senior secondary schools.