This video is designed to help build general and scientific vocabulary for State and standardized exams by using word-part (prefix, root, suffix) explanation and examples.br br This video is part of a series. In this video, we introduce this word parts: centr.br br You can download the free student engagement worksheet quiz that we made for this video at the following link: br Other free resources we've made:br - For links to many free educational resources, please visit our website (no 3rd party advertising, no subscriptions, no paywalls): br - For our free apps for Apple's Mac and iPad (collects no data, no advertising, no subscriptions, no paywalls, no in-app purchases), please visit our page on the Apple App Store.