iKnow is a website that provides access to official and user-created language courses. iKnow's "Japanese Core" official course teaches the top 6,000 words used in the Japanese language. Students can review and study vocabulary words, read example sentences, and listen to recorded audio of conversational and professional Japanese. The site saves a user's progress as he works through each new term, and regularly performs test reviews of learned terms to ensure the user keeps the knowledge stored in his long-term memory.
Children who have some working knowledge of the Japanese language can communicate with native Japanese speakers and other Japanese learners on Lang-8. Users post journal entries in their respective, target tongues, and native speakers correct the errors in the users' journals. Students can review their mistakes in the comments section.
Hiragana and katakana workbooks teach children the proper stroke order for writing the Japanese alphabet. Some workbooks not only provide space to allow a student to practice writing, they also include new vocabulary words and practice sentences. On that same note, Japanese notebooks designed for elementary school students don't include lessons for learning hiragana and katakana, but come with ample space for practicing Japanese. The pages include grids similar to those seen on graphing paper, but are large enough so that the student has room to write the entire character. American notebooks rarely provide enough space to allow a student to write Japanese characters in full.
Heisig's "Remembering the Kanji" provides a mnemonic system for learning and memorizing the Japanese system of writing. Children learn about "primitives" -- the basic elements of a kanji -- and create a story, relating to the keyword of a character, based upon these primitives. Although "Remembering the Kanji" doesn't teach a student the "on" and "kun" readings (the two different ways to read a character), children can learn to recognize and remember the meaning of singular and compound kanji.