Hi, my name is Deci (dee-SY)
Learn. Play. Compete.
Real lessons, free games and live quiz battles for Years 1 to 11. Parents see exactly where their child stands.
Learn
Pick your year and a subject. Five real questions, right now.
Play
Chess, checkers, Connect 4, crosswords. Free, no sign-up.
Compete
Live quiz battles with friends or the class. Join with a code.
No account needed for any of these. Setting up for your child?
For parents
Know exactly where your child stands.
A learning map, not just a score. What the curriculum covers, what your child has done, where they are strong, and what to do next. Updated after every session.
Set-up takes a minute. No credit card.
A real Year 4 maths course. Green is done, orange is next.
What Decifer is
The UK curriculum, Years 1 to 11
Maths, English, Science, History and Geography. Every topic mapped to what school teaches.
Checked before your child sees it
Every question passes six automated checks. Anything below the bar is not published.
Built for children, clear for parents
Children get points, cards and streaks. Parents get a learning map that shows what to do next.