[Symbol] Old wineskins [Meaning] 
previously educated students
p r e v i o u s l y u n e d u c a t e d s t u d e n t s
p r e v i o u s l y e d u c a t e d s t u d e n t s
t e a c h i n g
n e w t e a c h i n g
p r e v i o u s t e a c h i n g