1) Apt 2) Docile 3) Manipulable 4) Tractable 1) Docile 2) Educationally apt 3) Manipulable 4) Tractable 
• (a.) Capable of being taught; apt to learn; also, willing to receive instruction; docile.
Teach'a·ble adjective Capable of being taught; apt to learn; also, willing to receive instruction; docile. « We ought to bring our minds free, unbiased, and teachable , to learn our religion from the Word of God.» I. Watts.