I am a Math teacher in a private school in the US. A majority of students consider probability and statistics a very boring topic and tend to focus significantly less compared to other topics. So last semester I reworked the curriculum and started playing games with decks of playing cards. I encouraged students to calculate probabilities, expected values, etc then come up with strategies to improve their odds of winning. I saw a meaningful boost in both engagement and grades.
I shared this teaching method in a message group. Some public school teachers liked the idea but had reservations about the legality of the content. They were worried about playing cards' connection to gambling, which could "raise the eyebrows of school boards and other authorities". As far as I know minors playing card games is fine as long as there is no money or other things that have monetary value on the line.
Of course school districts could decide to ban such content if they considered it undesirable, but is there any education-related legislation in any state that explicitly states that "material that incites or resembles real-life gambling" cannot be used in schools, blocking them from being introduced to the classroom in the first place?