Well, it could be students like a nerdy kid who loves books, for example. Maybe a popular girl who is the center of attention in the 6th grade class. And there could also be a kind teacher who helps the students through difficulties.
In 7th grade short stories, the main characters are mostly kids in that grade level. There could be a new kid in school who is the focus, trying to adapt to a new environment. There may also be a character who has a conflict with their parents about their grades or their choice of activities. And then there are those characters who are in the middle of a friendship drama, like two friends who start to grow apart because of different interests or the influence of other classmates.
In the 'The Lost King' 8th grade short story, the main character is obviously the lost king. However, there could be other important characters too. There might be a young maiden who has the gift of foresight and she helps the king by giving him clues about how to get back to his kingdom. There could also be a group of thieves who initially try to rob the king when he is lost and alone but later have a change of heart and end up helping him. And of course, there could be the king's family members, like his queen or his young prince or princess, who are worried about him and play a role in the story, either by searching for him or by holding the kingdom together in his absence.
Maybe there is a teacher as one of the main characters. The teacher could play an important role in guiding the students in the story, like helping them with a difficult project or solving a conflict among the students.
I don't know as there's not enough information given. It could be students, teachers, or parents in the context of 7th - grade life.
Some good topics could be 'My First School Trip', 'The Magical Pet', or 'A Day in the Life of a Fourth - Grader'.
In 'The Giving Tree', the main characters are the tree and the boy. The tree is always there for the boy, giving him things like its branches to swing on and its trunk to build a boat. In 'Charlotte's Web', the main characters are Wilbur the pig and Charlotte the spider. Wilbur is a friendly pig, and Charlotte is very intelligent and uses her web - writing skills to save Wilbur.
I'm sorry that I'm unable to tell you the main characters in 'the ravine book 6th grade story' without having read it. However, in a story like this, it's likely that there are protagonists who are probably children. They might be friends or classmates. There could also be some supporting characters, such as local people if the ravine is in a particular community. These characters would interact with the main characters, either helping or hindering them in their experiences related to the ravine.
In the 5th grade double dutch story, the main characters could be the two best double dutch jumpers in the 5th grade. They are constantly competing with each other, but also pushing each other to get better. Their rivalry and friendship are central to the story as they strive to be the best in double dutch at their school.
The main characters in the 'hatred 12th grade story' could be two best friends who are in 12th grade and something happens that turns their friendship into hatred. Maybe one betrays the other in a crucial moment, like stealing a college scholarship opportunity, and they become the central characters in this story of hatred.
I don't know as I haven't read it, but probably 7th - grade students and the turkey.