Granger helps Montag in numerous ways, all of which aid in his ability to reeducate himself about the world around him. When Montag discovers Granger and his band of refugees, he is on the run, scared, and being hunted for his life. Granger openly accepts him and tells them what they have been up to on the outskirts. After the bomb goes off, they fully assimilate him as part of the group that will go back and help to rebuild civilization, this time hopefully as it should be built, not making the same mistakes. So, here are a few of the ways Granger helps Montag:
1. He accepts Montag for being the intellectual that he is, instead of stifling and hunting him for it. This helps in the reeducation process, because Montag can breathe a sigh of relief, and have the actual freedom to ask questions and seek the answers.
2. He lets Montag know that he can truly help by offering what knowledge he has. He can offer the knowledge of the bible that he has partially memorized. That makes Montag feel useful, and full of purpose.
3. He introduces Montag to an entire group of people that can help teach him.
4. He gives Montag leadership, trust and respect in their mission to rebuild society.
5. He gives Montag precious knowledge that his own grandfather had given him, also through the myth of the Phoenix, and through other tidbits.
In these ways and in many more to come, Granger helps and will help Montag to build a new life, and to feel confident in his new role. I hope that helped; good luck!