index - a numerical scale used to compare variables with one another or with some reference number. 1  margin of error, margin of safety, safety margin - the margin required in order to insure safety; in engineering the margin of safety is the strength of the material minus the anticipated stress.
Nutty Ways to Celebrate Squirrel Appreciation Day This Year. SQUIRRELS! Whether you love them or loathe them, National Squirrel Appreciation Day, January 21st, is a great time to take a few moments and learn about these nutty animals. If you count flying squirrels we have 10 tree species in North America.
Paraprofessional Appreciation Day 2019 is observed on Wednesday, April 3, 2019 Paraprofessional Appreciation Day 2020 is observed on Wednesday, April 1, 2020 Wondering where we find all of these Days, or if they re even real? or if you have any information about Paraprofessional Appreciation Day, or maybe you want to create your own!