"Let's dive into it!": Learning electricity with multiple representations. - Elham Beheshti; Mmachi G. Obiorah; Michael S. Horn (IDC, 2015)

Independent Word Discovery for People with Aphasia. - Mmachi G. Obiorah; Anne Marie Piper; Michael S. Horn (ASSETS, 2017)

JumpGym: Exploring the Impact of a Jumping Exergame for Waiting Areas. - Mmachi G. Obiorah; Emily Harburg; Maarten Bos; Michael S. Horn (CHI PLAY (Companion), 2017)

U!Scientist: Designing for People-Powered Research in Museums. - Mmachi God'sglory Obiorah; James K. L. Hammerman; Becky Rother; Will Granger; Haley Margaret West; Michael S. Horn; Laura Trouille (CHI, 2021)

Designing AACs for People with Aphasia Dining in Restaurants. - Mmachi God'sglory Obiorah; Anne Marie Piper; Michael S. Horn (CHI, 2021)