I created a Wallwisher/Padlet for my student to use as a resource for their final project in choir. The information they will find on this web tool can be used to refresh their memories on the requirements of the final project and how it will be graded.
I also created a Poll on Poll Everywhere. This poll is a way for the students to express what type of music is their favorite. This can be used at the beginning of the class as a hook to grab their attention.
I believe these tools encourage participation because they use technology in an interesting way to hook the student's attention toward the lesson.