The Summer School will be held at the Faculty of Science, (D3 and D4 buildings) on the Main Sherbrooke Campus (Campus principal) of Université de Sherbrooke situated at: 
2500, boulevard de l'Université
Sherbrooke (Québec) J1K 2R1

You may consult the "acces by road" page  the University's website, available in French only: Accès routiers On this page, you can plan your itinerary through Google Maps. 

Other useful links 

For transportation in the city of Sherbrooke (in French only): Société de transport de Sherbrooke

Transportation between Montreal and Sherbrooke: Limocar