Many teachers report difficulty in finding suitable historical source material when planning authentic and meaningful learning experiences, particularly for Key Stage 2 and Key Stage 3 pupils.
Mae'r dystiolaeth hefyd yn nodi bod angen digon o amser ar addysgwyr er mwyn cynllunio eu darpariaeth trochi hwyr wrth ystyried nod deublyg addysg drochi, sef addysgu iaith a chynnwys ar yr un pryd.