Library of Congress call numbers group books by topic. Research topics in education and activism can be interdisciplinary, which means there may be many areas in the Library of interest. The following are some you might find useful.
E97 Native Americans. Education
L7 - 991 Education (General)
LA5 - 2396 History of education
LB5 - 3640 Theory and practice of education
LC8 - 6691 Aspects of education
LC65 - 245 Social aspects of education
LC1390 - 5160.3 Education of special classes of persons
LD13 - 7501 Individual institutions. United States
LE3 - 78 Individual institutions. America (Except United States)
LF14 - 5627 Individual institutions. Europe
LG21 - 395 Individual institutions. Asia.
LG401 - 681 Individual institutions. Africa.
LG401 - 681 Individual institutions. Africa.
LG401 - 681 Individual institutions. Indian Ocean Islands. Australia. Pacific Islands.
LJ3 - 165 Student fraternities and societies, United States