Meet The Team Behind Challenge Island

Jill Garcia, MBA

Owner/S.T.E.A.M. Education Consultant

Jill is the owner of the Challenge Island™ South Charlotte program. She is a former award-winning K-8 elementary school teacher with public and private school experience. A “real” S.T.E.A.M. Queen, she spent nearly 20 years in the Pharmaceutical Sciences industry employed by Fortune 500 companies such as Johnson & Johnson and Abbvie in a variety of leadership roles.

An avid reader and science geek, Jill is passionate about equity in education. Her mantra is “elite educational experiences should not be reserved just for the elite.” Jill received her undergraduate degree in English Language Arts/Teacher Certification Program from Virginia Union University. She received her MBA from Syracuse University-Whitman School of Business.

Jill runs her local Challenge Island business in Charlotte, NC where she lives with her husband, daughter and 2 pups.


Sharon Duke Estroff M.A.T.

Founder & CEO

Sharon is founder and creator of the Challenge Island™ program, She is an award-winning elementary school teacher with two decades of experience in Atlanta public and private schools. She started Challenge Island in her second grade classroom and began running it as an enrichment business using the current model in 2003. It has been growing by leaps and bounds ever since.

Sharon is a nationally recognized parenting and education expert and a freelance writer for numerous national publications including Scholastic Parent and Child, Parents, Woman’s Day and Good Housekeeping magazines. She is the author of the popular parenting book, Can I Have a Cell Phone for Hanukkah? (Random House) and co-author of the upcoming Challenge Island book series that turns the Challenge Island curriculum into an exciting and educational story. She is sought-after speaker who has presented to scores of communities nationwide about the trials and tribulations of raising kids in the digital age.
Sharon received her undergraduate and graduate degrees from Emory University where she graduated Phi Beta Kappa and Summa Cum Laude.

She continues to run her local Challenge Island business in Atlanta, Georgia where she lives with her husband and four children.



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