Dr. Plucker's JHU homepage https://education.jhu.edu/directory/jonathan-plucker-phd/
The Center for Talented Youth at JHU (highly recommend this program for accelerated learners!) https://cty.jhu.edu/
The Belin Blank Center https://belinblank.education.uiowa.edu/
The Davidson Institute https://www.davidsongifted.org/
The National Association for Gifted Children https://nagc.org/