dd2 has cp and is in mainstream. we've always had fantastic support - in the uk the funding for het TA came in very handy for the class, who had a lot of un-dx sn/ children with behavioural issues who had not yet 'proved' a requirement for funded support. so dd2's TA was used a lot for other (at that point apparently nt) children.
dd2 has a higher iq than her doctor lol (which he thinks is funny) but is currntly unable to access the provincila gifted programme because it requires her to be able to write, and not type (which she can do).
on the behaviour issue - i have always always always (and loads of times on different threads on here) asked parents who believe that their own child's education is suffering as a result of another child's sn/ behaviour, to speak to the HT of the school. often schools have to beg the lea for additional funding to support these kids, and they need as much ammunition to take with them as possible. don't get snarky about disruptive kids - offer the school some constructive pointers about the necessity for giving the children concerned extra support, and keep on at them until they do.
the problem is not sn kids, the problem is lack of support for sn kids. insist your school provides adequate support, that way, no-one's precious darling's education is suffering, not princess fanny, and not the sn child who finds him/ herself unable to benefit from the same educational experiences as his/ her peers.
both dd1 and ds1 have experienced classes which would be routinely disrupted due to children with clearly very substantial needs - table throwing/ scissors throwing/ attacking the teacher etc. as both schools were unable to provide interim additional support whilst 'assessment' was taking place, effectively an evacuation plan was drawn up to ensure the rest of the children's safety in the event of an incident. the classes lost a lot of time sitting in the school hall/ alternative classroom whilst it was dealt with. with the support of parents, the school eventually secured emergency funding from the lea pre-dx, and ft support was put in place. everyone benefited, from the children who were no longer forced to evacuate their classroom with alarming regularity, to the children whose support staff got to know them/ their triggers, and helped them learn coping strategies.
i just fee really sad at the number of parents who shout 'out! out!' at children with any sort of sn... (and i've lost count of the number of parents who have been horrifed at the discovery that the poor little disabled girl in their child's class is actually the brightest of the lot)