Tutoring11+

CSSE standardised score calculator

For the Essex 11+. This uses the actual formula and the actual cohort figures CSSE publishes in its annual Standardisation Report, so for the years listed it is not an estimate - it is the same calculation the consortium ran.

Why this one can be exact

CSSE is the only 11+ test in England that publishes its method. Every year it releases a Standardisation Report giving the cohort mean, the standard deviation and the age adjustment for each paper, along with every candidate’s raw and standardised scores. Feed those numbers back into the published formula and you get the official answer.

Everywhere else - Kent, Buckinghamshire, anything GL marks - those numbers are confidential and refitted each year. There, the honest answer is a range, which is what our Kent Test calculator gives you.

The formula

Each paper is standardised on its own:

standardised = ((mark − cohort mean) ÷ standard deviation) × 15 + 100

Then an age adjustment is added, worked out from how many days younger the child is than the oldest in the year group. The two papers are added, and the result is multiplied by 1.5. A child born on 1 September who scores exactly the cohort average on both papers ends up on 300 — which is the check CSSE itself states, and a useful way to spot a calculator that has dropped the 1.5.

Years available

2024, 2022, 2020 entry. Constants for a given year are published in the October after the test, so the current year cannot be calculated until then — the cohort statistics do not exist until the cohort has sat the paper. Any tool claiming to give you this year’s standardised score before then is guessing.

Sources