"Not only is vocabulary an important part of reading comprehension, but knowing what words mean also allows students to make connections between previously learned information and new information. Studies have shown that students with greater background knowledge about a topic learn more, remember more, and are more interested in what they are learning." (Marzano & Simms, 2013)
National Reading Technical Assistance Center (2010) A Review of the Current Research on Vocabulary Instruction, RMC Research Corporation
National Literacy Trust (2013) Lost for Words: Poor literacy, the hidden issue in child poverty. A policy position paper.
Available at: http://www.literacytrust.org.uk/assets/0001/7863/Lost_for_Words__child_poverty_policy_paper.pdf
Nagy, W. E. (1988) Teaching vocabulary to improve reading comprehension. Newark, DE: International Reading Association.