I love starting 4th grade math class having students complete a round of Multiplication by Heart. Today a bunch of them logged into Mathigon, presses Play in Multiplication by Heart, and received a message they had already completed their round today. Any advice?

Hi Kim! Thanks for your interest in MBH. Sometimes, due to the nature of spaced repetition, students won't have any cards to answer on a given day. You can learn more about this in the tutorial video at https://mathigon.org/teachers#tutorials.45 Students can always do a day in shuffle mode if they like! That is explained in the video as well. Hope this helps!