The brain learns in bursts, not blocks.
Short bursts of learning every few minutes outperform hour-long study sessions.
For decades cognitive scientists have known about the spacing effect — knowledge encountered in short, frequent bursts is retained dramatically better than the same content delivered in one sitting. Schools can't replicate this. Class periods are 45 minutes. Homework piles into single blocks. QuriOS weaves learning into the natural breaks between game rounds your child is already playing — so retention happens by default, without anyone forcing it.
Research
Spacing effect · Ebbinghaus 1885, Cepeda et al. 2008, Bjork lab decades of replication