One Task for ALL in a group or One Task for EACH in a group – OPTION

I work in a school and I have to coordinate a lot of teachers and students. We decided to buy the full pack of your plugin, thinking that it was going to help us very much assigning tasks to teachers and help teachers assigning tasks to students. We love your plugin, but unfortunately, the lack of the option to choose if you want to assign One Task to EACH and every one in a group of users (group, project, user role, etc) or if you want to assign One Task to ALL of them (whenever a user of the group marks a task as completed, that task is completed for everyone) is forcing us to look for a new solution that’d allow us to do that.
We would love to see the progress bar grow as each member of the group completes that same task.
I’ve looked in lots of forums and haven’t been able to find an answer. Is there a way to do that and that we have missed? Is it planned for future versions?
Thank you very much for your great job!