The Educational App Development Toolkit for Teachers and Learners is designed to introduce the basic and some intermediate concepts of Android app development on the App Inventor (AI2) platform. It provides hands-on activities and tutorials to use the Designer and Blocks Editor components of App Inventor to create apps that can be readily downloaded and used on any Android smartphone or tablet. Furthermore, the hands-on sessions will guide you on how to use features such as text-to-speech, accelerometer, speech recognition, drawing, video, games and music playback. The Toolkit also provides guidelines on how to package and distribute your app. For teachers a training plan is also provided that can be used to provide training to students in an instructor-led environment. // Translation done by Chandi Chathurika Perera. // English and Bengali versions also available. See http://hdl.handle.net/11599/1729 and http://hdl.handle.net/11599/3069 respectively.