As I have shared previously MMSD has a subscription to BadgerLink. They offer a long link of resources which can feel overbearing. I am sure at one time or another you have used one of their resources, Teaching Books, for example.
On the Links 4 Kids page is.gd/scharks I highlight several Badgerlink resources that are helpful for research projects. One of those resources is Encyclopedia Britannica - Elementary Edition. It is best to access from Links 4 Kids and is only accessible from school.
The screencast below takes you through the recently re-designed Elementary Edition of Encyclopedia Britannica. I think it can be a great resource for research on Animals, Countries, or States.
Encyclopedia Britannica from The Library Shark on Vimeo.