Evaluation Study and teaching (Secondary) Textbooks 12 English language 9 Science 9 Curricula 6 Malay language 6 Arabic language 4 Composition and exercises 4 Attitudes 3 Computer-assisted instruction 3 Readability 3 Curriculum planning 2 Design 2 Educational technology 2 Educational tests and measurements 2 Grammar 2 High schools 2 Individualized instruction 2 Physical education and training 2 Reading (Secondary) 2 Research 2 Science teachers 2 Ability testing 1 Academic achievement 1 Aids and devices 1 Analysis of variance 1 Art 1 Audio-visual aids 1 Behaviorism (Psychology) 1