Does anyone have any evidence that deaf children who have significant language delays but are otherwise able, do well by repeating a year in school and then staying with that cohort?
General experience in many countries suggests that having children leave their cohort to catch up academically (by repeating a school year) works for some children. At least it does for those who demonstrate normal development and miss a significant amount of school time due, for example, to the need for medical care or because the family has been abroad in a country with a school system not as well developed as the “home” one.
If the student has any disability, comes from another country, or is particularly well-established socially in their original cohort, the outcomes after being held back often are not so good. Then again, if the parents and/or the student want it – the chances for success increase. Involuntarily holding a child back is more likely to hinder good development.
Unfortunately, there does not appear to be any research on this topic specifically with regard to deaf children and/or those with specific language delays, but there certainly needs to be! So, in Scandinavia, at least, I would only recommend repeating agree if the student appears to have a documented, fair chance to catch up.