I also like to keep track of what facts students have mastered. In the past I've used a chart that I created called "Buzzing Through Multiplication" which is free in my TPT store if you'd like to download it. I also have a multiplication log that is free in my TPT store that I use to keep track of how often students practice their facts at home.
In the Multiplication Facts unit I created this week, there is a new tracking chart that is monkey themed. It includes trees for 1-12 and also individual student markers that can be a girl monkey, boy monkey, or a banana. My kids love moving their monkey from tree to tree as they practice and master their facts. I normally write their student number on it instead of their name so it's a little more private. I also included a one-page chart in the unit so you can keep track of where your kids are with their fact mastery all in one place. There are some images below of the unit and you can also get more information at my TPT store. What ways do you help your kids master their multiplication facts?