Genre
Audio-visual aids
1
Case studies
3
Charts, diagrams, etc
1
Conference papers and proceedings
1
Congresses
2
Cross-cultural studies
1
Educational films
2
Instructional and educational works
1
Instructional films
3
Juvenile literature
2
Juvenile works
2
Longitudinal studies
1
Problems and exercises
2
Problems, exercises, etc
3
Programmed instruction
1
Study and teaching (Middle school)
1
Study guides
2