“Dengys tystiolaeth ac ymchwil ryngwladol fod cysylltiad cadarnhaol rhwng dosbarthiadau llai o faint a chyrhaeddiad, yn enwedig ar gyfer y disgyblion ieuengaf o gefndiroedd tlotach.
“International research and evidence tells us there is a positive connection between smaller class sizes and attainment, particularly for our youngest pupils from poorer backgrounds.