@wahaj Go to the Notes page at http://japaneseclass.jp/notes, and click on the "New Note" button at the top of the page. Let us know if you need step-by-step instructions. Remember to create a name or phrase first before adding kanji and vocabulary. One note can store hundreds of kanji and vocabulary entries.
@wahaj I found the problem. This new JCJP website will "not" allow you to take a quiz on newly-created notes. The previous version of this website allowed it, which is why you can only see quiz buttons on really-old notes.