It is only the third of seven phases of the Primary 1 registration exercise, but children applying to study at a handful of popular schools may already need to have a ballot.
When registration for Phase 2A2 closed yesterday, six schools - Red Swastika School, Ai Tong School, Catholic High School, Henry Park Primary, Nanyang Primary, Nan Hua Primary - had more applicants than vacancies available.
Henry Park Primary had 42 children applying for 23 vacancies in this phase, while Ai Tong School had 49 children registered for its 36 places. At Nan Hua Primary, 43 children vied for 37 spots, and at Nanyang Primary, 58 for 55 places.
Catholic High School had 32 children vying for 30 spots. Red Swastika School had 40 applicants for 38.
Phase 2A2 is for children whose parents or siblings are former pupils, or whose parent is a staff member at the school.
Another school, CHIJ St Nicholas Girls' School, was oversubscribed by the end of the earlier Phase 2A1 last Tuesday. It is the only school with no vacancies for Phase 2A2.
Madam Seah Miew Siang, who works in an oil and gas company, managed to get her six-year-old daughter into the school in Ang Mo Kio last week.
The 42-year-old, who is a member of the school's alumni association, said: "I enjoyed my time at my alma mater, and the school culture and values are things I would like my daughter to experience."
Last year, CHIJ St Nicholas was one of four schools that held a ballot for places in the 2A2 registration phase, after a rule change limited the number of vacancies available in the earlier phases. Under the rule introduced last year, schools have to reserve 40 places for the later 2B and 2C phases.