x - Scarsdale Schools
x - Savannah State University
x - Savannah State University
x - Saint Joseph High School
X - Sacramento State
x - Royal Holloway
x - Royal Holloway
x - Royal Holloway
x - rosenmath.com
x - rmcarrasco
X - Rizaldi
X - Rizaldi
x - Research portal - Tilburg University
x - Research Commons@Waikato
X - Rensselaer Polytechnic Institute: Computer Science
X - Read
X - rci.rutgers.edu
X - RAY DEPARTMENT
x - RADICE
x - Quia
