Nowadays, mobile computing allows users to take advantage of a computer anywhere and anytime. Complex interactions like text entry or programming on-the-go remain challenging. This is due to the lack of input options via keys [FZ94]. One option for solving these problems are chorded keyboards that are connected to the mobile computing device via Bluetooth. The main feature of keyboards is the creation of characters by playing chords and not by single keystrokes. Furthermore, the keyboards have a small size due to their wearability. In this thesis, the chorded keyboard Tap Strap 2 is evaluated as a possible input tool for AVAR, a tool for the visualisation of data in Augmented Reality. For this purpose, a special mapping of the Tap Strap combinations was created that is suitable for programming Pharo code. The focus of the thesis is the design, implementation, and preliminary evaluation of a web application called Learn2Tap. This application is designed to help users learn the Tap Strap combinations and train them to write Pharo code using the Tap Strap. The usability of the Tap Strap and Learn2Tap was evaluated through a 20-day user study. Users were given 15 minutes daily to use Learn2Tap. The outcome of the study was determined through interviews, user tracking, weekly testing and daily saving of learning status. The result of the study is that the users would not choose to use the Tap Strap as an input device because of the difficulties they encountered. However, if they had to learn the combinations of the Tap Strap a second time, they would use Learn2Tap again.