Design And Development Of Accessible Instructional Interaction Application For Visual-impaired Students

The rapid development of Internet and mobile terminal technology leads to the tendency of mobile learning.Today in China,vision-impaired people take a large proportion among all the disabled.However,because of the limited resource and scarce faculty,education for those vision-impaired people remains a severe problem.For vision-impaired students,many multimedia devices in schools are provided for normal people,and students cannot use them directly,leaving idle resources.Moreover,students lack interactions in the classroom and have little interest in learning.For teachers,not only need to mobilize the enthusiasm of vision-impaired students in the classroom,inspire students' interest in learning,but also need to know the teaching effect in time,understand the students' learning situation,and thus make corresponding adjustments to their own teaching.After the analysis of the characteristics of vision-impaired learners,the needs of them and their teachers,the current state of mobile learning,and related classroom interaction theories,a mobile terminal software for vision-impaired teachers and students to interact in classroom has been designed and developed based on relevant knowledge and principles of software development,the Android development platform,the development technology of Kedaxunfei and the Yunba instant messaging service.This software is mainly for teachers and learners to effectively interact in the classroom.The teacher can edit the pre-lesson question bank on the computer's back-end management interface,store the questions in the back-end database,and then choose an appropriate time in class to selectively send the questions to the students by the software.when the student receives the teacher's questions,he or she will perform the corresponding operation.Questions will be read aloud,and the student can select the answers to complete the teaching interaction.The back-end database will present the learning data of these students to the teacher in the form of visualized interface.Teachers only need to click on the mobile device to easily track the students' learning situation,so as to adjust his or her teaching accordingly and achieve the purpose of teaching intervention.In this way,not only can we fully take advantage of information technology,improve resource utilization,change the shackles of the traditional teaching model,but also can improve teachers' teaching quality and stimulate learners' interest in learning.The realization of barrier-free interaction between teachers and students in the classroom can strengthen the connection between learners and teachers,so that learners can truly become masters of learning.Therefore,the real informatization accessibility is realized and thus fully promotes education equity.