create student collection

create_student_collection.js

use school
var types = ['exam', 'homework', 'quiz']
for (student_id = 0; student_id < 100; student_id++) {
    for (type=0; type < 3; type++) {
  var r = {'student_id':student_id, 
	         'type':types[type], 
	         'score':Math.random() * 100};
	db.scores.insert(r)
    }
}