Classification
370 - Education
264
378 - Higher education
92
371 - Schools & their activities; special education
54
379 - Public policy issues in education
47
306 - Culture & institutions
36
320 - Political science
19
375 - Curricula
15
510 - Mathematics
13
372 - Elementary education
12
374 - Adult education
9
333 - Economics of land & energy
8
507 - Education, research & related topics
8
300 - Social sciences
7
500 - Natural sciences & mathematics
7
305 - Social groups
5
361 - Social problems & social welfare in general
5
700 - The arts; fine & decorative arts
5
100 - Philosophy & psychology
4
304 - Factors affecting social behavior
4
340 - Law
4
418 - Standard usage & applied linguistics
4
551 - Geology, hydrology & meteorology
4
658 - General management
3
900 - History & geography
3
107 - Education, research & related topics
2
140 - Specific philosophical schools
2
303 - Social processes
2
330 - Economics
2
338 - Production
2
341 - Law of nations
2
363 - Other social problems & services
2
520 - Astronomy & allied sciences
2
600 - Technology
2
808 - Rhetoric & collections of literature
2
000 - Computer science, information & general works
1
004 - Data processing & computer science
1
120 - Epistemology, causation & humankind
1
150 - Psychology
1
155 - Differential & developmental psychology
1
170 - Ethics
1
174 - Occupational ethics
1
200 - Religion
1
301 - Sociology & anthropology
1
302 - Social interaction
1
307 - Communities
1
323 - Civil & political rights
1
362 - Social welfare problems & services
1
407 - Education, research & related topics
1
620 - Engineering & allied operations
1
621 - Applied physics
1
more ...