Yn olaf, mewn perthynas â dysgu ac addysgu. Mae’r dystiolaeth ryngwladol yn dangos mai gan lawer o’r gwledydd sy’n mabwysiadu grwpiau o ddysgwyr cyrhaeddiad cymysg am gyn hired â phosib – fel arfer tan 14/15 oed pan fyddant yn dechrau astudio am gymwysterau cenedlaethol - y mae’r systemau addysg mwyaf cyfartal.
Finally in relation to learning and teaching. The international evidence indicates that many of the countries that have the most equitable education systems are those that adopt mixed attainment learner grouping for as long as possible – usually until the age of 14/15 when they begin to study for national qualifications.