Under which approach do pupils attain more optimally, a logical versus a psychological procedure of instruction? Pupils do need to achieve well in a world of science. Science is all around us and pupils need to understand various principles and laws of science. Thus, teachers in the school curriculum must choose carefully objectives for pupil attainment in each lesson and unit of study. The worth and value of each needs to be weighed in order to promote relevancy in science teaching and learning situations.