Karen Brennan came up with the original idea for Scratch Day and organized the first worldwide event in 2009, while she was a graduate student at the MIT Media Lab. Now a professor at Harvard Graduate School of Education, Brennan also originated the ScratchEd online community for educators and the Scratch Educator Meetups.
The Scratch Day website was designed by Carl Bowman and Jessica Im and implemented by Matt Gabor, Peter Landry, and J. Hogue. Kasia Chmielinski, Lisa O’Brien, and Saskia Leggett contributed to the conceptualization and organization of the website. Natalie Rusk and Ricarose Roque advised on the development of Scratch Day resources.