Curated OER
Numbers Worksheet
In this writing numbers worksheet, students practice writing the numbers ten, twenty, thirty, forty, fifty, sixty, seventy, eighty, ninety and one hundred seven times each for mastery.
Capital Community College Foundation
Guide to Grammar and Writing: Abbreviations
A very competent look at how to use abbreviations in their proper context. This site also examines the proper use of abbreviations with titles, numbers and phrases.