331 Copyright © 2021, IGI Global. Copying or distributing in print or electronic forms without written permission of IGI Global is prohibited. Chapter 20 DOI: 10.4018/978-1-7998-3476-2.ch020 ABSTRACT Grid Onput is a set of novel two-dimensional codes comprising extremely small dots. The present authors recently developed software to overlap the dot codes on the user’s designed sheet, to create a content to replay audios, to create a standalone application to replay multimedia, and to create an application to replay multimedia on iPad. Simply touching the dot codes with a speaking-pen and/or a dot-code reader enables users to directly access the corresponding digital information; a maximum of four mediums can be easily linked to each dot code icon. In collaboration with schoolteachers all over the world, one of the authors, Shigeru Ikuta, has been creating a variety of original self-made content and conducting various activities at both general and special needs schools. This chapter outlines the recent develop- ment of the state-of-the-art Grid Onput dot code technology and presents basic information regarding the creation of original teaching materials using newly developed software and the use at both general and special needs schools. Multimedia-Enabled Dot Codes as Communication Aids Shigeru Ikuta https://orcid.org/0000-0001-5065-190X Otsuma Women’s University, Japan Masamichi Watanuki Hattatsu Kyoiku Kenkyukai Co., Ltd., Japan Shinya Abe Gridmark Inc., Japan