Schools used this to make beautiful photo collages during COVID (teachers holding signs to make sentences of good wishes) One actually said he used Collageit 3 Free (wouldn't necessarily have to be a Mac)
Very thorough list/pages of resources, including organizational tools, student pages, and even book suggestions. Laura Candler sells several things on her website, but she also gives a LOT away for free.
Another great resource from Laura Candler. Includes some free resources, including a webinar. The things she has for sale are pretty reasonably priced. I thought this might tie in with the recent math PD.
Readings with free activities that are lexile-leveled. It is designed for grades K-6, but there are many readings with lexiles scores of 800-1020. Also, it provides lesson plans aligned with various children's books.
You can create a free account. Rec by Karen Ault
You can view the slideshare of this presentation. I like the way she included screen shots of some of the preparation and also what the results and data will look like.