Hoping to put this or RPi3 into foldable card cases and connect to power, vga/lcd monitor, keyboard and mouse for schools in developing world. Would the chip or chip pro be better than RPi3 please?
Well, CHIP Pro is not suitable for this use case. I would recommend RPi3 because it have more CPU power, more USB ports (you can connect kb and mouse without using a hub), built in Ethernet and HDMI port, so you can connect HDMI and DVI monitors directly (DVI with passive adapter). CHIP have only composite video out of the box (as well as RPi) and in order to connect HDMI or VGA you need to purchase additional "dip" board. So, to round this up, RPi is better except you need VGA, in this case CHIP + VGA DIP is probably a better choice, but it would require an USB hub.
But on second though, CHIP have a 4GB on-board storage, and or RPi you need to use removable micro SD card. I'm not sure if kids and removable micro SD's is a good combination, it may be ok, may be not, I just don't know.