Measurement & Data in 1st Grade1.MD Standards

Short answer. This is the grab-bag domain of 1st grade, and honestly the most useful one at home. It covers three different life skills: measuring length, telling time, and making sense of simple data. Your child will order three objects from shortest to longest, measure a book by laying paper clips end to end, read a clock to the hour and half hour, and answer questions about a chart with three categories.

Each skill gets its own cluster. 1.MD.A handles length, including the clever trick of comparing two objects using a third one. 1.MD.B is time on both analog and digital clocks. 1.MD.C is data: organizing it, showing it, and answering how many more or fewer are in one category than another. No rulers with inches yet; the measuring is done with repeated same-size units first, on purpose.