Notation
Below is an interactive Note Identification game. There you can practice your fluency with name/note associations. It is completely randomized so you can practice it for as long as you would like. I would recommend playing this little game with yourself while sitting at the piano, so that you can also play the note shown on the card on your piano while reciting its name out loud. This will maximally strengthen your [ note-->piano key-->name ] associations which are the cornerstone of fluent reading of musical notation.
Below, the Notation ID Flash Cards (Downloadable) allows you to download the .html file directly to your computer, smart phone, tablet, laptop etc. so that you can play the game offline, and without needing to be on this website. During my testing, I’ve found that it works perfectly well on PCs, Android devices and Apple laptops/computers. However, Apple smartphones (or anything running iOS) don’t allow outside html files to run on their native browsers. The workaround for this is to download Microsoft Edge (or Koder, which is a HTML viewers app you can find in the App store) on your iPhone. Then long press the html file, hit the Share button, find Edge among the apps, and open it with Edge (or Koder).