We've reached an age where our kids can be a huge help to us. In fact, they can almost work as hard we do. You should teach them new things, but you won't need to do one-on-one as much as with the little ones. Please don't think that they don't need to do things with us anymore, you will need to find other ways to hang out with them.
Inspection is key when you have teens. You need to train them to do their best at a job. They can mow the lawn, do yard work, clean bathrooms, do laundry, clean thier rooms (yes, I do think they should keep their rooms clean) and a myriad of other jobs.
I have a home business and mine enjoy some of the extra things that I can find for them to do.
Help them learn to enjoy doing a good job.
Keep pressing on and enjoy your family this weekend.