How to use the arithmetic fluency self-check
When a child breezes through addition but stalls on fractions, guesswork is a poor way to decide what to drill next. List each operation on its own line with the number of items attempted and the number answered correctly, and this tool works out accuracy for every operation, tallies how many clear the threshold you set, and names the weakest operation that still falls short.
The math is plain. Accuracy for each operation is correct items divided by total items. Overall accuracy sums the correct items across all operations and divides by the summed totals, so it is weighted by item count rather than a flat average of the per-operation rates. Accuracy that lands exactly on your threshold is treated as meeting it.
One limit matters. There is no official accuracy benchmark by grade for arithmetic facts, and this page is not a validated screening instrument, so it does not assign a grade level or a developmental stage. Supply the threshold your workbook or tutor uses and read the output as a self-check you repeat under the same threshold.
Frequently Asked Questions
No. It is not a validated screening instrument. It only tallies the item counts you enter, so it does not place a child at a grade level or developmental stage.
There is no official figure. Use the mastery line your workbook, teacher or tutor already uses, and keep the same threshold every time so the trend stays comparable.
It counts as meeting the threshold. With an 80% threshold, 80.0% is shown as met and 79.9% is shown as needing practice.