What you learn

Flash Vocal — Roman Numerals trains reading and writing Roman numerals, from I to MMMCMXCIX. A Roman numeral appears — XIV — and the child says its value out loud: “fourteen”. The other way round, a number appears and they write it in Roman numerals.

A Roman numeral is always met in reading: a century in a textbook, a volume on a cover, a clock face, the number of a king. As long as you break it down on your fingers, you are not reading it, you are computing it — and that difference only shows out loud: either the number comes, or the hesitation is heard.

• Years 5 and 6 — Roman numerals are on the curriculum, and century numbering rests on them.
• Years 7 and 8 — history names centuries in Roman numerals all year long: stumbling on the reading means losing the thread of the lesson.
• Adults — deeds, book chapters, clock faces, names of kings and popes.
• Teachers — up to 30 pupils followed separately.

The app is available in sixteen languages: English, French, German, Spanish, Italian, Portuguese, Dutch, Polish, Czech, Turkish, Catalan, Ukrainian, Russian, Japanese, Vietnamese and Chinese. It follows the device language, and expects the answer in that language.