Fluency is defined as accuracy + speed. Fluency is a GREAT way to test for mastery but it is also super easy way to collect data.
Here is a fluency pack that contains 630 literacy flashcards.
Long Vowel: a, e, i, o, u
Short Vowel: a, e, i, o, u
Vowel Digraphs: oa, ea, ee, oo, ai