Fluency is the ability to read a text accurately, quickly, and with expression. Reading fluency is important because it provides a bridge between word recognition and comprehension. Students who struggle with reading fluency have a harder time understanding what they're reading.
Reading Rockets,
What is Timed Repeated Readings? Timed repeated reading is a practice used to monitor the fluency development of a student. Readying fluency is needed to help students comprehend their reading. (readingrockets.org)
Timed repeated readings should be done using books or passages the student has read before that are at an independent reading level (i.e. books the student can read with 95% accuracy or above). Most timed repeated reading sessions should include 3-4 re-readings of the same text.
What you will need:
Two copies of the assessment passage — one for the student and one for the teacher
Stopwatch or clock
Pencil
Carefully select passage to be used, and determine the type of assessment information you want to gather:
One minute reading. The student reads for 1 minute. The teacher or partner counts the number of words read correctly in one minute (WCPM). This score is as valid as calculating perfect correct or accuracy on longer readings. Provide some practice time with non-assessment reading material before beginning the 1 minute timed reading.
Timed repeated readings. The student reads the same passage for 1 minute multiple times (3-5). The teacher or partner counts how words the student read in 1 minute. The number of words read results can be graphed using a bar graph.
Words correct per minute (WCPM). Choose a passage. Time the student when s/he reads the passage.
"Reading Rockets", https://www.readingrockets.org/strategies/timed_repeated_readings
Watch this video to see timed repeated reading in action