I made the mistake of getting my class used to receiving an extra credit assignment every weekend last year. Problem is, although they remembered, I often forgot! Solution: Google Adventure! I know that not all kids have access to the internet at home, but A) it is extra credit (optional) and B) technology is so easily accessible these days that it's not an unreasonable request.
The assignment asks them to pick a topic, Google it, and list 5 things they learned. While it is short, I found that many students would turn it in with way more than 5 facts AND with pictures attached! My students loved it!
You can find it in my TpT store (free): https://www.teacherspayteachers.com/Product/Google-Adventure-1976903