These are suggested vocabulary words to go with Fourth Grade Common Core Math Unit 1: Place Value, Rounding and Estimation. Words include: algorithm, digit, estimate, expanded form, word form, standard form, numbers, period, place value, and rounding. Cards are complete with word and matching picture, to assist the supported child. These word cards should be posted in your classroom. They will be used in context throughout the unit (and the school year!). Students can make the word wall intera