Here is a 14th explanation for the teen mental health crisis which does not work: parents are increasingly abusive since 2010 (they are not). Nobody has yet proposed an explanation for the crisis that works--especially internationally-- other than the rapid teen transition from flip phones to smart phones around 2012. This also explains why academic achievement stopped rising around 2012 and started declining, as shown in both NAEP and PISA scores. Students with smartphones pay less attention to teachers, and to fellow students. @jean_twenge laid out 13 failed explanations here: afterbabel.com/p/13-explanat… Here is her rebuttal of the 14th explanation: tinyurl.com/3rbtsemy Note that teen "satisfaction with life" used to track satisfaction with relationship with parents. Until they moved onto smart phones. Can't we at least get phones out of the school day?