I thought it was just classroom etiquette, from the word of the same name, 礼式, which is れいしき. Individually the kanji are bow and ceremony.
If you don't get a better answer, I know where one may exist. I have a copy of a book I'll have to find. It is on Japanese etiquette, and was used in Japan as part of their formal instruction. It covers such topics as the proper way to bow depending on the situation, how to properly kneel before sliding open a door, the proper uniform for students, so on and so forth. It is a very old Japanese book, and has the foundations for many still practiced formalities in there.
Have not gotten far in the translation, myself. Not enough skill or time. But you can look and see if it covers what you want.
Go to this site:
http://kodomo4.kodomo.go.jp/web/ippangz/cgi-bin/KJN.pl
タイトル sort, under the ア section, the first book, 絵入少国民作法読本 / 大日本儀礼研究会∥編. -- 清教社, 昭和14
Give that a try for children's manners.