And he hath put in his heart that he may teach. Rather, "And he hath put it into his heart to teach." He (God) has given him the gift of being able to teach others, and so has enabled him to form a body of workmen competent to carry out his conceptions.
Both he and Aholiab. God has given the same gift to Aholiab. On the special talent of Aholiab, see the comment upon Exodus 31:6.