THE EFFECT OF IMPROVISATION OF INSTRUCTIONAL MATERIALS FOR BIOLOGY INSTRUCTION IN SENIOR
Background of the Study
Science education must seek to permit the individual to develop to the fullest his capacities for adjustment and continuous change in order that he may meet the problems of his day and solve them successfully when they arise. Biology, the study of living things is a science which has developed methods of its own. The structural complexity of the organisms themselves, the multiplicity of functions occurring simultaneously in organism’s body and the interrelationship
between the organisms and their environment have led to methods of study unique to this particular science. Jean Bremner (2000) stated that the methods are characterized by the art of scientific investigation in relation to pupils’ study of new specimen, the experimental approach to biological science in relation to experiment carried out by the individual study. These are necessary for the effective transfer and permanent communication of biological knowledge. Practical experience in any science for that matter is crucial for proper understanding of any principle and application of the knowledge in that subject for cognitive growth and technological orientation and advancement. In appreciation of this fact, Lee (1999) emphasized that if biology is to perform the above role of improving the society, then the biology teacher must do the following:
1. Choose the best materials to present to students.
2. Try new roles, materials and strategies.
3. Make use of individual instruction.
Therefore activities such as collecting of materials, observing, recording observations, classifying and carrying out field work should be well encouraged. The method for achieving this is through visual instruction. It was the original method in biological science when the naturalist devoted his study to organisms as he found them in nature. The result of his work, he wrote down to be passed on to others. The knowledge was finally put in form of books. As the study of biology becomes more popular in schools, and number of students increased, it becomes more difficult to study original materials. Part of this difficulty comes by the use of laboratory, preserved materials and chart and models. But the pressure of larger number of students and increasing cost caused this
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