When I decided to trash my tent, which was so old and was no longer of any use for active camping, I and my mentor in trekking, firstly used the same tent to teach kids of how to pitch a tent.
And, I also used some part of the tent fabric to make a sort-of a sand bag for me, which I used to tie to my legs during my running sessions.
And, I have also used a piece of fabric of an old tent to add a patch to the bottom of my sack which was on the verge of getting torn off. This little money-saving trick let me use the same sack for about 20 hikes (more), and then finally I got rid of that sack.
Along with this, I have seen one of my friends using 2-3 layers of that fabric as a sheet which he used to put beneath his sleeping bag, in order to ensure that he doesn't have to ever (dry)wash the sleeping bag.
Then, I can suggest one more use of it, that usually material of a tent is hard to tear through effortlessly. So, If I am carrying something like a hunting knife, I can make a carrying pouch for it.
If nothing out of above, the best that you can do is, Give it to kids, let them learn! I learnt to pitch the tent using a similar kind of tent that my uncle gave me.