Here are some informative, useful and cautionary articles on school visits. Hope this compilation is useful to schools and authors who go into schools.
Advice for schools
https://www.booktrust.org.uk/supporting-you/practitioners/how-to-arrange-an-author-visit/
Suggestions for schools
http://awfullybigblogadventure.blogspot.co.uk/2018/02/why-authors-enjoy-visiting-schools-by.html
http://picturebookden.blogspot.co.uk/
https://jabberworks.livejournal.com/637011.html
Alternative ideas
https://www.tes.com/news/school-news/breaking-views/8-alternative-ways-celebrate-world-book-day
https://jocotterill.com/world-book-day-alternative-ideas/
http://awfullybigblogadventure.blogspot.co.uk/2018/02/my-manic-schedule-during-wbd-by-chitra.html
Advice for authors
http://www.bookmoot.com/2010/02/advice-for-authors-on-school-visits.html
From across the pond
for authors and schools – especially read the last section on how to maximise the visit.
http://blogs.publishersweekly.com/blogs/shelftalker/?p=17050
http://thewhynot100.blogspot.co.uk/2014/09/7-tips-for-perfect-author-visit.html
https://www.writermag.com/2017/01/19/author-school-visits/
https://www.ptotoday.com/pto-today-articles/article/139-organizing-an-author-visit
Topics to debate and discuss
http://awfullybigblogadventure.blogspot.co.uk/2018/02/school-visits-and-book-sales-vexed.html