Why is she struggling? Doesn't she have a Catechism?
The catechism doesn't cover much of the Catholic life that has been lost, like the May Crownings and other devotions the author mentions. A good Tridentine missal has filled out those areas for me.
I think parents were in the habit of outsourcing their faith education duties to the parish or the Catholic schools, which exacerbated the problem when those went into catechetical decline.