Children from some ethnic groups (for example, Asian and children with a mixed ethnic background) tend to achieve better on average in school compared to others.
Mae plant o rai grwpiau ethnig (er enghraifft, Asiaidd a phlant sydd â chefndir ethnig cymysg) yn tueddu i gyflawni'n well ar gyfartaledd yn yr ysgol o'i gymharu ag eraill.