If children and young people are three years or more behind expected levels, after teachers have tried different ways of helping, this can be called Moderate Learning Difficulties (M.L.D).
Os yw plant a phobl ifanc dair blynedd neu fwy y tu ôl i'r lefelau disgwyliedig, ar ôl i athrawon roi cynnig ar wahanol ffyrdd o helpu, gellir galw hyn yn Anawsterau Dysgu Cymedrol.