Students Love Mashup Math!
I joined the membership program (there is a small annual fee) so that I could access all of their materials. They also added a video library that includes all of their video lessons without any advertisements. All of the activities are easy to download and share as worksheets. I have been using their stuff for years and it is always a big hit with students.
How I Use It
I use Mashup Math puzzles every week with my 5th and 6th grade students, usually as warm-up activities. I also use their video lessons for remote teaching lessons.