Joshua Chua of Raffles Institution set a new record in the B Division boys' 100m, while Singapore Sports School broke records for the C boys' 4x100m relay and the C and B boys' 4x400m relay.
Yin Yichen of Cedar Girls' Secondary and Jezebel's SSP teammate Cherlin Sia both cleared 1.50m, with Yichen winning the silver on countback.
Diane managed to fight off the competition, crossing the finishing line 0.12s ahead of Tanisha Moghe of Cedar Girls'.
Reuben came close to breaking the electronically-timed record for the event, missing out by a mere 0.08s.
Coming in second was Isabelle's teammate Nurul Insyirah with a 27.31s effort while Bernice Liew of Nanyang Girls' High finished third in 27.36s.
Isaac Toh of Raffles Institution (RI) finished second in 58.01s while Muhammad Hazim of SSP was third in 58.46s.
Celeste Goh got the better of Pan Xin-Min of HCI this time round, who had beaten her in the 400m final.
Tan Jing Wei of Cedar Girls' Secondary came in second with 1:11.96 while Palada Tang of Singapore Sports School finished third with 1:13.05.
