AACAP | American Academy of Child & Adolescent Psychiatry

This website has a lot of excellent sources for a range of disabilities, as well as other issues that children face such as drug and alcohol abuse, physical and sexual abuse, bullying, being in a military family, and more. There is a glossary of disorders and disabilities, an index of terms addressed, resource centers with FAQs and other information on disorders, and expert interviews on many related topics. There is also a section for information for students and children related to self-advocacy and learning about mental illnesses. The website has many sets of videos, like this one where students discuss their experiences in a short video.

Child Development Institute

This website has many excellent resources for parents that can also provide insight for teachers. There are many articles on helping students and children who have ADD/ADHD, particularly with homework. There is also an overview of the stages of adolescence, and how to help students through it. An individual section contains articles written by field experts, ranging on topics from learning, to family living, to how to be a parent.

LDA America

This website provides information on managing learning disorders as a parent, an educator, and adult, and a professional. Assessment, technology, and mental health are emphasized in each category, as well as issues such as employment, post-secondary options, and early intervention are also covered (as well as much more). For educators, there is information on dyslexia, disgraphia, dyspraxia, and dyscalcula, as well as things like ADHD, auditory processing disorder, and nonverbal learning disorders.

Do2Learn

This website has a great amount of information on how to identify different disabilities, as well as common characteristics of students with them and strategies to help them in the classroom. This website covers ADD, Autism Spectrum Disorders, Developmental Delay, Fetal Alcohol Syndrome, Emotional Disturbance, Intellectual Disability, Specific Learning Disability, Speech or Language Impairment, TBI, and Twice Exceptional. It also goes further and contains information on how to help students with their academic, social, and behaviour management skills. A lot of the information is aimed to younger grades, but the ideas behind the activities are still solid and helpful.

Mentalhelp.net

This particular link to the site is a single page of a very lengthy and informative document on intellectual disabilities. There is a vast wealth of information here; this particular page focuses on effective teaching methods. However, also on this website is information on a wide variety of mental disorders, including ADHD, anxiety, bipolar, schizophrenia, epilepsy and more. It also addresses external problems that some students may face whether disabled or not, such as abuse, addiction, eating disorders, dating, divorce, and far more. This is definitely worth looking into.

NICHCY | Parent Center Hub

This is a website with lots of information on many different disabilities. It offers prevalence rates, signs, tips, and more. This website is going out, but another website has taken up the currently posted information and organized it into a legacy resource section on their website. The base website itself is also a great resource for parents, whether or not they have a child with a disability. A very reliable resource for information on students with disabilities, this PDF has tips for teachers for teaching students with AD/HD, TBI, Autism,  LDs,  and IDs. While it is a bit dated, the information is still generally solid.