Calculate Percent Accuracy Here’s how to calculate the accuracy of the reading. Example E = 12 RW = 134 Ratio: 12 _ 134 134 ÷12 = 11.16 round off the number to 11 1:11 1:11 round down to 1:10 90% accuracy. Easy 95-100% correct: The book level is suitable for independent work and reading practice. Instructional 90-94% correct: The book level is suitable for guided reading instruction. Difficult 80-89% correct: Book level is generally too difficult and the student may lose control of meaning and structure. Below 90% likely a poor book choice. Process E RW Divide the denominator by the numerator. Record in the form 1:x. Check the conversion table to find the percent accuracy for the ratio. Round down to make a conservative determination. Percent Accuracy 99.5 99 98 97 96 95 94 93 92 91 90 89 88 86 83 80 75 66 50 Task 1. Count the total running words (RW). Do not include titles. Tally the number of errors (E). Write the ratio at the bottom of the recording sheet. 2. Convert to a ratio with a numerator of one. 3. Record the information on the bottom of the running record sheet. 4. Determine the percent accuracy. Fill in this number on the front of the recording sheet. Error Ratio 1:200 1:100 1:50 1:35 1:25 1:20 1:17 1:14 1:13 1:12 1:10 1:9 1:8 1:7 1:6 1:5 1:4 1:3 1:2 Percent Accuracy Conversion Table Assessment: Running Records © Queen's Printer for Ontario, 2003
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Calculate Percent AccuracyHere’s how to calculate the accuracy of the reading.
Example
E = 12RW = 134Ratio: 12_134
134 ÷12 = 11.16round off the number to 11
1:11
1:11round down to 1:1090% accuracy.
Easy 95-100% correct:The book level is suitable for independent work and reading practice.
Instructional90-94% correct:The book level is suitable for guided reading instruction.
Difficult80-89% correct:Book level is generally too difficult and the student may lose control ofmeaning and structure. Below90% likely a poor book choice.
Process
E RW
Divide the denominator by the numerator.
Record in the form 1:x.
Check the conversion table to find the percent accuracy for the ratio.Round down to make a conservative determination.
Percent Accuracy99.5999897969594939291908988868380756650
Task
1. Count the total running words (RW). Do not include titles. Tally the number of errors (E). Write the ratio at the bottom of the recording sheet.
2. Convert to a ratio with anumerator of one.
3. Record the information on the bottom of the running record sheet.
4. Determine the percent accuracy. Fill in this number on the front of the recording sheet.
Error Ratio1:2001:1001:501:351:251:201:17 1:141:131:121:101:91:81:71:61:51:41:31:2
Percent Accuracy Conversion Table
Assessment: Running Records © Queen's Printer for Ontario, 2003
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