Question

what had been put up on the bulletien board

Answer 1

Answer:

The French districts of Alsace and Lorraine had been taken over by the Prussians. Hence, the bulletin board displayed the news that an order had come from Berlin to teach only German in the schools of Alsace and Lorraine.

Answer 2

There was a notice on the bulletin board. It was written that only German language would be taught in the schools of Alsace and Lorraine. The order had come from Berlin. It was also written that French language would not be taught in those schools.