NET
9 But when some were stubborn and refused to believe, reviling the Way before the congregation, he left them and took the disciples with him, addressing them every day in the lecture hall of Tyrannus.
Darby
9 But when some were hardened and disbelieved, speaking evil of the way before the multitude, he left them and separated the disciples, reasoning daily in the school of Tyrannus.
KJV
9 But when divers were hardened, and believed not, but spake evil of that way before the multitude, he departed from them, and separated the disciples, disputing daily in the school of one Tyrannus.