NET
20 an educator of the senseless, a teacher of little children, because you have in the law the essential features of knowledge and of the truth—
Darby
20 an instructor of the foolish, a teacher of babes, having the form of knowledge and of truth in the law:
KJV
20 An instructor of the foolish, a teacher of babes, which hast the form of knowledge and of the truth in the law.