as a psychologist i get some references, based on that, i want to say parents should be aware of some topics…
http://www.uth.tmc.edu/uth_orgs/hcpc/understanding_childhood_disorders.htm
www.chironeuroindy.com/PDF/assesstools_chdis-6172.pdf
http://www.psychologyinfo.com/problems/children.html
http://www.ldinfo.com/
its a vast area, lets start with little.