Each tool contains items in a game-style format that children generally find fun and engaging. The ELOM-R Language Tool contains 10 items and the ELOM-R Mathematics Tool contains 18 items. The children are assessed one at a time, in a quiet, appropriate space at their school, ECD centre or elsewhere. Data capture is fully digitised using Survey CTO (on an appropriate tablet). Instructions for assessors are colour-coded for ease of use, and stop rules are hard coded into the tool in such a way that if the child does not succeed on a specific item, the system automatically progresses to the next relevant item.