Here is a list of resources that I have found helpful or had recommended to me.
I've heard really good things about PFLAG and their support for the trans community and family.
Resource Centers:
SMYRC (Sexual and Gender Minority Youth Resource Center)
Portland QCenter
PFLAG
From PFLAG
Our Trans Loved Ones: Questions and Answers for Parents, Families, and Friends of People Who Are Transgender and Gender Expansive
guide to being a trans ally*
Training Links
The Gender Unicorn
The Gender Planet
How to Explore your Gender when AMAB
Expanded FAQ by ReconcilingWorks
Trans FAQ from ReconcilingWorks
5 Trans Facts
5 Ways To Make Schools Safer for LGBTQ Students
Resources for Trans Youth and Parents/Friends Of Youth
Trans Student Educational Resources
We think he might be a boy
Boy or girl? Gender a new challenge for schools
A Mother’s Transition Story: Part 1: The Beginning
Boy or girl? Gender a new challenge for schools
A Mother’s Transition Story: Part 1: The Beginning
Trading Places: When Our Son Became a Daughter--A Mother's Story of a Family's Transition
Raising My Rainbow: Adventures in Raising a Fabulous, Gender Creative Son
The Youth and Gender Media Project
Becoming Johanna — A Trans Youth’s Story
book list for trans teens from Goodreads
Suggested Reading for youths 12 - 18
list of resources from transyouth family allies
For Parents | TransYouth Family Allies