Download or read book Content-Area Vocabulary Level 3--Numerical Prefix tri- written by Timothy Rasinski and published by Teacher Created Materials. This book was released on 2014-03-01 with total page 11 pages. Available in PDF, EPUB and Kindle. Book excerpt: Take your students beyond mere memorization of words by taking a roots approach to learning! This resource, geared towards third grade students, focuses on root words for specific content areas such as science or social studies.