Meet The Team Behind Challenge Island

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.

Sarah Goldberg

Director of Operations and Support

Sarah grew up in Miami, Florida and earned a degree in Geography & Anthropology from Florida State University. After graduation, Sarah joined C.A., a group that runs camps and before-and-after school programming for families and children of the US Armed Forces. She was assigned to bases around the world including Japan, Germany, Hawaii, and Bahrain. After her world tour, she moved to Brooklyn, New York and became the founding Operations Manager of an elementary charter school in historic Coney Island. After a few years in Brooklyn, wanting to be a little closer to her family, Sarah and her husband moved to Atlanta in 2017. Sarah joined the Challenge Island Tribe, first as an assistant teacher, then teacher, now Director of Operations and Support!

Meet Our Corporate Tribe