Classroom Audio Tools

For next high school 6 week period we need some audio tools for different projects. I have use example Spreaker for student radio shows and book discussions.We have BYOD program going on and almost every high school first grader at Jyväskylä city, Finland  has their own device at school, mainly laptops. Also we have some iPads and Chromebooks from our school.  Most of students like to use audio apps from their smart phones.