Looks like the Great Firewall or something like it is preventing you from completely loading www.skritter.com because it is hosted on Google App Engine, which is periodically blocked. Try instead our mirror:
This might also be caused by an internet filter, such as SafeEyes. If you have such a filter installed, try adding appspot.com to the list of allowed domains.
Book one of four in a set of beginner textbooks. This book introduces students to hiragana and katakana, along with 17 basic kanji. In Book 1 students learn to talk about themselves (family, daily routines, school, inviting a friend over, etc.)The 3rd edition was authored by Hiromi Peterson and Naomi Hirao-Omizo and published by Cheng & Tsui (2007). It is available for purchase here.