Young people who regularly miss school are more likely to under achieve in examinations, become isolated from their friends and become involved in anti-social behaviour.
Mae pobl ifanc sy'n colli'r ysgol yn rheolaidd yn fwy tebygol o dangyflawni mewn arholiadau, cael eu hynysu oddi wrth eu ffrindiau a chymryd rhan mewn ymddygiad gwrthgymdeithasol.