Have your students look at the pictures to estimate their lengths. Then have them cut out and use the attached ruler to measure the summer themed pictures in this standard units of measure activity. Measurements are either to the inch or to the 1/2 inch. This measurement activity can be used for a worksheet, an assessment, or a math center activity. It covers CCSS 2.MD.A.1, 2.MD.A.3, and 2.MD.A.4. I use this in my second grade classroom with much success. First grade students can use it as a challenge and it can also be used for third graders who need a little extra help.
Student answer page
Picture page 1
Picture page 2
Also, check out...
Summer Time at the Beach Nonstandard Measurement - same activity (minus the estimation and difference in length questions), with different size pictures to match the shell ruler:
Spring Time Standard Measurement