Xtra Math is a free website that teachers can set up for students to have a quick assessment on their math facts. This can be addition, subtraction, multiplication, and division. I have my students do a session every day. It is timed, and only takes a couple of minutes. It generates a helpful report to show you exactly what the students are grasping. If they answer correctly, and in time, they get a smiley face, if it is correct but takes longer they get a check mark, if the time runs out it shows you a timer, and if they get it wrong it shows an X. 

It is a quick and easy way to have students practice their facts!