WordNet sense 1 (ready and willing to be taught):

teachable

WordNet sense 2 (easily managed (controlled or taught or molded)):

manipulable, tractable

WordNet sense 3 (easily handled or managed):

gentle

WordNet sense 4 (brought from wildness into a domesticated state):

tame

WordNet sense 5 (inclined to yield to argument or influence or control):

yielding

WordNet sense 6 (very docile):

meek