Candidate's Age & Equivalent Grade
| Age of Child | BSS Classes | England | Scotland | USA | Australia |
| 2+ | Pre-School | Pre-School | Pre-School | Pre-School | Pre-School |
| 3+ | Nursery | Nursery | Nursery | Pre-School | Pre-School |
| 4+ | Pre-Kindergarten | Reception | P 1 | Pre-School | Pre-School |
| 5+ | Kindergarten | Year-1 | P 2 | Kindergarten | Kindergarten |
| 6+ | Year-1 | Year-2 | P 3 | Grade-1 | Year-1 |
| 7+ | Year-2 | Year-3 | P4 | Grade-2 | Year-2 |
| 8+ | Year-3 | Year-4 | P 5 | Grade-3 | Year-3 |
| 9+ | Year-4 | Year-5 | P 6 | Grade-4 | Year-4 |
| 10+ | Year-5 | Year-6 | P 7 | Grade-5 | Year-5 |
| 11+ | Year-6 | Year-7 | S 1 | Grade-6 | Year-6 |
| 12+ | Year-7 | Year-8 | S 2 | Grade-7 | Year-7 |
| 13+ | Year-8 | Year-9 | S 3 | Grade-8 | Year-8 |
| 14+ | Year-9 | Year-10 | S 4 | Grade-9 | Year-9 |
| 15+ | Year-10 | Year-11 | S 5 | Grade-10 | Year-10 |