Below you will find the text with the answer to your question and at the end of the analysis of it
Holes Part 2, Chapter 30
Stanley looks up as Zigzag and Squid approach. Zigzag tries to make Stanley take his cookie and then begins pushing Stanley while telling Stanley not to push him. Stanley insists he doesn't want trouble as he carefully steps backwards around the holes. He's relieved when Mr. Pendanski walks over, but is shocked when Mr. Pendanski tells him to hit Zigzag to "teach the bully a lesson." Stanley makes a halfhearted attempt to hit Zigzag and suddenly, Zigzag grabs Stanley and begins actually punching him. Stanley falls and Zigzag continues punching, even after Mr. Pendanski yells for him to stop.
Analysis:
The events that surrounded the beginning of this fight suggest that, although justice or justice is considered worthy, the fact that Mr. Pendanski facilitates this type of violence and conflict suggests that he is not interested in children treat each other with kindness. Thus Mr. Pendanski and the other adults can maintain their power by being cautious that the children do not join to organize an uprising.