Hertie School is a state-accredited private university founded in 2003 as Germany’s first professional school for public policy, offering an internationally oriented, policy-focused academic environment.
Hertie School is one of the participating institutions of Berlin School of Economics.
You can refer to this link to see how to get to Hertie School.
Click here for the map.
Note that in Berlin you need to stamp your ticket in the validation machine before you get in the metro/train, or after you get on a bus, if you hold a physical single ticket. You can also buy tickets on BVG app and validate your tickets on the app, and then no physical action is needed.
From Hotel Berlin:
By Metro (U-Bahn): Walk 9min to U Nollendorfplatz, and then take U2 (Pankow direction) to U Stadtmitte (exit C), and then 3min walk to arrive.
By Bus: Walk to Bus station Lützowplatz (next to the hotel), and take Bus 100 (to U Unter der Linden) or Bus M29 (to U Kochstr, Checkpoint Charlie), and then walk 8/11 min to arrive.
From Monbijou Hotel:
By Walk (Recommended): 25min walk, passing Museum Island, Unter den Linden and Friedrichstrasse.
By Train/Metro (S-bahn and U-bahn): Walk 2min to S Hackescher Markt, and then take any train (west direction, Platform 4) to S+U Friedrichstraße. Then you can transfer to U6 (Alt-Mariendorf direction) to U Stadtmitte (exit F), and then 3min walk to arrive.