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.
. Merchiston celebrations
Merchiston's players celebrate with the trophy after the under-18s cup final Photo: Ross Parker - SNS Group / SRU
. Lifting thhe cup
Merchiston's players celebrate with the trophy Photo: Ross Parker - SNS Group / SRU
. Hands on the trophy
Merchiston's players celebrate with the trophy Photo: Ross Parker - SNS Group / SRU
. We've done it
Merchiston's players celebrate at full-time after the under-18s cup final Photo: Ross Parker - SNS Group / SRU
. Try scorer
Merchiston celebrate a try in the under-18 cup final Photo: Ross Parker - SNS Group / SRU
. On the charge
Merchiston's Alex Callaway on the attack Photo: Ross Parker - SNS Group / SRU
. Line break
Merchiston's Drew McCall Smith burst through a tackle to score his try Photo: Ross Parker - SNS Group / SRU
. Doubling up
Merchiston's Tom Currie takes on two Stewart's Melville tacklers Photo: Ross Parker - SNS Group / SRU
. 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
. Crossing the line
Loretto celebrate scoring a try during the under-18s Shield final Photo: Paul Devlin - SNS Group / SRU
13. Flying Finn
Loretto's Finn Duraj scores a try during the Shield final Photo: Paul Devlin - SNS Group / SRU
15. No holds barred
Lorreto and Queen Victoria School compete for the ball Photo: Paul Devlin - SNS Group / SRU
16. Watson's winners
George Watson's players and fans celebrate after their under-16 cup final win over Dollar Academy Photo: Ross Parker - SNS Group / SRU