Build Allow and Build Disallow
The Build Allow and Build Disallow Blocks allow you to finely control specific areas where Students are and are not allowed to dig and place blocks. They also provide a simple way to override the global build settings of a world for a specific purpose.
Students will always be able to dig and place blocks on anywhere above a Build Allow Block (even if “Students Can Build” is unchecked in the Teacher Menu), while they will never be able to dig and place blocks anywhere above a Build Disallow Block (even if “Students Can Build” is checked on the Teacher Menu). The blocks themselves cannot be destroyed by Students, regardless of settings.
If students try to dig and place blocks above Build Disallow Blocks, they will receive a message in the bottom-left corner telling them that they can’t. It is important to note that the Build Allow and Build Disallow Blocks only check infinitely above the placement of the block. While this means they can be hidden below ground and still be effective on blocks above, anything beside or below them is unaffected.
In the example below, Students who otherwise cannot build would still be unable to do so below or beside the suspended Build Allow Blocks, while Students who are able to place blocks can continue to do so below and beside the Build Disallow Blocks.
Detailed block properties can be found on the pages for Build Allow Block and Build Disallow Block.
Border Blocks can be used to guide or restrict where students are able to travel. When one is placed down, Students will be unable to navigate past them from either above or below, although they can still work around them. In the example below, Students would be unable to enter the box from any way except through the gap in the top-left.
Border Blocks do not interfere with Teachers in any way, but when a Student tries to navigate over or under a Border Block, they will be stopped and given a message in the lower-left side of the screen. They will also be unable to dig or place blocks over or under a Border Block, even if building is otherwise allowed.
The area a Border Block checks goes infinitely up and down, this means you can hide Border Blocks and they will still be effective. In the example below, Students would be unable to walk off the front of the balcony nor would they be able to go underneath it; same with building or digging.
More information about the properties of the Border Block can be found here.