From Hannover Airport, take the S5 train (S-Bahn) towards Bad Pyrmont and leave at Hannover central station (Hannover Hauptbahnhof).
There is a train every half hour. Travel time to Hannover central station is around 20 minutes. Timetable information is available on the Deutsche Bahn website.
You can buy a ticket (about 3€ one-way) at the ticket machines on the platform. Please remember to validate the ticket in the small blue machines before getting on the train!
At the central station, you have to change to the tram/subway in order to get to the conference venue: see below.
The location of the workshop (Dr. Buhmann Schule) is in walking distance to Hannover central station (Hannover Hauptbahnhof). See direction below:
A map of Hannover’s tram/subway system is available here.