The purpose of this study is to analyze the style and the subject of the teaching kits published by the National Archives in the Australia, the USA. and the UK. The teaching kits-the educational document packets-made in printed format or PDF, HTML style are useful tools and better medium with which the national archives support classroom study and publicize the holdings of archives to students and teachers. Although subjects covered in the teaching kits vary slightly according to national circumstances, primary topics are history of nation and government, civil rights, immigration, war, events, culture, and records, etc. It is important to select the theme, find the related original records, and edit packets for students take much interest in.