Separating twins-especially in early grades-can create a range of practical and emotional hurdles for the children, their families, and educators.
Research and experience point to several common challenges:
1. Emotional distress and anxiety.Many twins feel a deep bond from sharing the womb and early life. When forced apart in kindergarten or primary school, they often experience heightened anxiety, crying, clinginess, or even physical symptoms like headaches.Parents report that most twins placed in separate classes are “very traumatized,”
2. Internalizing problems. Studies show that twins separated early (in the first year of school) have significantly more teacher-rated internalizing issues (e.g., anxiety, depression, withdrawal) compared to those who stay together. Later separation is linked to both internalizing problems and lower reading scores, especially for identical (monozygotic) twins
3. Academic impact While some research finds no overall difference in standardized achievement between separated and non-separated twins, early separation has been associated with lower reading performance in the first few years of school. Later separation also showed reduced reading scores for identical twins.
4. Social development concerns. Twins placed in different classrooms may miss out on shared peer interactions, making it harder to develop friendships outside the twin pair. They may also become a source of curiosity or bullying for other students, adding to social stress.
5. Identity and individuality pressures. Schools often separate twins to promote “independence,” but this can conflict with the twins’ own preferences. Around 81 % of preschool and kindergarten twins want to stay together, yet 58 % are split into different classes ¹. Forcing separation can make children feel that their identity is being ignored, leading to resistance or resentment.
6. Parental and teacher conflict. Many school principals favor separation, often believing it improves academic outcomes, but this view is not supported by most research. Parents and teachers frequently disagree with these policies, leading to disputes and added stress for families.
7. Logistical and administrative challenges. Schools may lack clear guidelines for handling twin placement, resulting in inconsistent practices. Some schools require medical notes or parental petitions to keep twins together, adding bureaucratic hurdles.
8. Long-term effects. Most negative impacts diminish by later primary grades, but some children-especially identical twins-continue to show higher internalizing scores and lower reading achievement through age. Early trauma can also affect confidence and school engagement in later years. In conclusion Separating twins can trigger anxiety, internalizing problems, and short-term academic setbacks, particularly for identical twins and in the early school years. The decision should be made on a case-by-case basis, taking into account the twins’ wishes, their relationship dynamics, and input from parents, teachers, and, where possible, a child psychologist. Flexible policies that allow for trial periods, gradual separation, or shared classrooms with individualized support tend to produce better outcome.
