Transport from charles de gaulle terminal 3 to rue des ecoles 33?

Question

via metor or transfer bus

Answer 1

See :  www.ratp.fr

Answer 2

Take the RER B marked "Direction : Massy-Palaiseau"

to the St. Michel stop.

Exit the station and walk east to the rue Saint Jacques.

Walk south (away from the river and Notre Dame) to the rue des Ecoles. Turn left.

Your destination is just past the intersection of rue des Ecoles with rue Valette.