I’ve been working away on some new Genki English worksheets, but the first ones to pop out are actually Katakana Worksheets for the Genki Japan site. Each one has plenty of space to practice each letter and a really clear diagram to explain the stroke order. Plus they look really good! If you are learning Japanese Katakana you’ll probably find them useful.
All 72 pages are on the GenkiJapan.net site as a free accompaniment to the Genki Japan songs, which you can download right now for the bargain price of $4.99!