This is a fun little set of under the sea themed task cards designed to meet 3rd Grade Common Core Standards in Linear Measurement and Graphing. With this set, students are asked to measure a series of arrows to the nearest 1/4 inch and record their data. Once data has been collected, students will then plot their data on a line plot graph and answer a series of questions about their graphs. Included are 20 cards, a recording sheet, and an answer key.