I would make a mouse pad out of it and it would always be near you.

Have a service for it in the back yard! As sad as it is, think about it like this: If you keep all the things that have been replaced, its taking up room that could be used for new toys or fabric. Give a speach, make the family go out in the back yard, do it proper!

I was kind of thinking of cutting it down and using the center part that isn't so worn. I can cut it with a jigsaw. Not always real neat but I can sand it even.[/quote]

Cut it with a glass cutter and you will not have to sand it at all. If you don't have one, take it to a store that cuts glass for windows and ask them to cut it for you. Most will do it at no charge or maybe a dollar for thier 5 min of time.

I would try to cut it ( or have someone do it) and cover the pieces to use as bag bottoms!

i would donate it to any organization that has a thrift store, or to the guild, senior center, local long-term care facility, school art department....
there are lots of places/people who put to good use things we no longer need. i would never just throw one away...even if it was broke i would find a way to salvage as much of it as possible and donate it.
thats just me, i don't throw away anything i think someone else could put to use; i pass it on instead of filling landfills.

I usually donate mine to someone in need that is starting out in quilting.

Take it to a glass company and they can cut it for you that way you wouldn't get hurt trying to cut. I took some cardboard templates and they cut me plexiglas templates they are wonderful. Not expensive either.

I broke the corner off my 6 x 24-inch ruler. I saved it because I use those handles on my rulers. If I wanted to roll up fabric on my ruler, I had to take the handle off. Now I have one designated for that purpose. The broken corner isn't a problem.

12-1/2 square is a hard size to think about what to do. Maybe wrap it in lots of batting and fabric and make a little ironing board out of it to use next to your machine. Just make sure you use lots of batting so it doesn't melt!

Or . . . just throw it away. I'm like you though, I hate the thought of adding more to the landfill, especially plastic.

Sign it, date it, and frame it with your favorite piece of material under it.

I offer free templates to everyone who sends me their postal address. I have a friend who cuts them for me. so I can ask Bob to cut it. I do have a cutter that I bought but it is harder to cut acrylic than you might think. I use my cutter to score templates with a 30 degree angle for the templates I send out free. I use saws all the time so no problem with that. I grew up in a construction family and so did my DH so I know how to do it safely.
Thanks for the thought.