The data in this release relates to attendance of pupils of compulsory school age (ages 11 to 15) in maintained middle, secondary and special schools.
Mae'r data yn y datganiad hwn yn ymwneud â phresenoldeb disgyblion o oedran ysgol orfodol (11 i 15 oed) mewn ysgolion canol, uwchradd ac arbennig a gynhelir.