Final answer:
The Labour Day weekend at the communist training school was published to promote communism and educate people about the history of class struggle.
Step-by-step explanation:
The Labour Day weekend at the communist training school was published to promote the ideals of communism and educate people about the history of class struggle. Propaganda played a significant role in the dissemination of the communist ideology, and large posters were used as an efficient way to reach and influence mass audiences. These posters often featured quotes from influential communist leaders like Lenin and Stalin and depicted scenes from historical events related to class struggle.