I used Canva to make a new sign for the classroom. All my students knew that to "look like a scientist" means to really look at what you are doing and not just draw what you think something looks like. Often what we think is no where near what something really looks like. Last year we practiced looking like a scientist all year. That was the motivation for this new sign for the classroom this year.
I think I learned about Canva through AOE. It is a very easy site to negotiate and I love the art they have available as well as the fact you can use your own. I think I will be turning to Canva for a lot of new signs this year.