There are few specific descriptions of the location of the local school. Maycomb County High School is just a block or two away from the Finch house, and the elementary school is adjacent to the high school.
The Maycomb school grounds adjoined the back of the Radley lot...; (Chapter 1)
and "The Radley Place jutted into a sharp curve beyond our house." From her treehouse, Scout could see the schoolyard where the children played. The school is located just off the "main residential street in town" (the street is never named), around the turn that leads first to the Radley house and then to the entrance to the "grammar-school building," which lies to the east of the high school building. The school can also be reached by a shortcut across the deer pasture, which is just two houses south of the Finch house; just west of the Radley place; and serves as a northern boundary of the school (see Chapter 6). For an excellent visual representation of the school site, check out eNotes' excellent Map of Maycomb link below.
In the 1982 Warner Books Edition of To Kill a Mockingbird, the location of the Maycomb school is discussed in Chapter 1, on pages 8 and 9. In the HarperCollins online book edition of the novel found in the Google Play Store, the location of the Maycomb school is described on pages 7 and 8. As was mentioned in the previous post, Scout says that the Maycomb school grounds adjoin the Radley lot, and the pecans from the Radley tree were considered poisonous to the school children. The Radley home is located a couple of homes to the South of the Finch household, adjacent from the light post on the main road. The Radley home also connects to the Deer's Pasture that is located in front of Maycomb's high school. In Chapter 6, on page 54 of the Warner Books Edition, Scout recalls running through Deer's Pasture to the back of her home after their raid on the Radley home. The schools are located to the south of the Finch home and slightly west of the Radley home. The Radley home serves as the northern boundary of the schools.