Toggle view for lessons in module

I have 5 Module and every module has more than 5 lessons.
So on course page it shows long index which is making page very long to scroll.

So my question is – how to add toggle view for Module so that lesson of one module can be seen in expandable mode at a time and other module will be in compact mode.

This can be done optionally.
This feature will be very useful for long courses.

(This is the common feature for FAQ blogs. )