ThinkWave Educator 3.0 Online Gradebook yearly subscription; Grades Online for students and parents. ThinkWave Educator 3.0 Multiple TW-V30E-Y$49.95, 2/$79.90, 10/$389.50, 20/$759.00, 51/$1,884.45, 76/$2,732.20, 101/$3,529.95, 126/$4,277.70, 151/$4,975.45, 176/$5,623.20