This poster is at Facebook. It is at the Tzahal site, the Israeli army, and is an official Israel Defense Forces poster. Ofer Neiman supplies the translation:
“When I go into the classroom, I know I am preparing tomorrow’s citizens for the next war”.
(Can you imagine a bleaker vision for a society? And when you see this exalting of the military, do you understand why some critics speak of fascist currents in Israeli society?)