Merchiston Castle School, George Watson’s College, Loretto School from Musselburgh and North Berwick High School were schools taking part in their respective finals. Click here to find out how they all got on.
Click the arrows below to look through all the best celebration and action images from the day.
5. On the charge
Merchiston's Alex Callaway on the attack Photo: Ross Parker - SNS Group / SRU
6. Line break
Merchiston's Drew McCall Smith burst through a tackle to score his try Photo: Ross Parker - SNS Group / SRU
7. Doubling up
Merchiston's Tom Currie takes on two Stewart's Melville tacklers Photo: Ross Parker - SNS Group / SRU
8. Lorretto lovin it
Loretto celebrate after winning the under-18s Shield final against Queen Victoria School from Dunblane at the DAM Health stadium next to Murrayfield Photo: Paul Devlin - SNS Group