Printing, rebuilt for the classroom. Build a set once and hand it out on paper. Print practice sheets or cut-out flash cards for any operation and number range, with an answer key for fast grading and name and score lines already on the page. US Letter or A4, shuffle to get a fresh worksheet from the same set, and no watermark on anything you print. Each sheet carries a QR code so students can open that exact set on their own device. Also new: practice reminders. Choose the days and the time, and get a gentle nudge to keep practice on schedule. Plus refreshed App Store screenshots, bug fixes, and usability improvements.