School was borrowed from Greek through Latin and then into Old English. The Anglo-Saxons (AS) already had learninghouse (leorninghús) and learningchild (leorningcild) in use and they are equal to the Greek school and Latin student. I think that since most learning was done in Latin the word school easily replaced learninghouse. I am beginning to use learninghouse when I can and will use learningchild also. They just make sense to me. I had to add them to my wordhoard.