There are many online resources for learning about mental health. Some helpful links I have found are listed below.
Teens Health: Providing a safe place for teens who need honest and accurate information, this website provides resources on mental health issues. http://teenshealth.org/teen/your_mind/
Reach Out: This website provides information on specific mental health disorders, as well as resources to help teens make safe plans when feeling suicidal, and helpful tips on how to relax. http://au.reachout.com/
Go Ask Alice!: Geared at young adults, this question and answer website contains a large database of questions about a variety of concerns surrounding emotional health. www.goaskalice.columbia.edu
A resource for parents looking for help dealing with behaviors and issues at home:
YouTube Channel Link: https://www.youtube.com/channel/UCRgWDRljrkKnogVps4i3ItA
A School Psychologist singing songs, and teaching social emotional skills