Most teachers like for their boards to be on the other side of the room from their desktop computer. To do this, you need to order longer cables.
Here are our official recommendations. Note that some brands of HDMI and Ethernet cables do not work with the boards, that is why we give recommendations because these are tested brands that we know do the job.
Lots of teachers also like for their computer screen to 'mirror' the board. Our current monitors are square and do not work with the mirroring feature. Because of this, we highly recommend using the opportunity of getting a new board to upgrade at least one of the monitors.