Help your child spot the correct arrays in this worksheet: having them count the items in each and check the boxes for the ones with 15 objects. Ask them to differentiate between rows and columns and explain which ones match the equation 5+5+5=15.
In this worksheet from Kids Academy, kids can start learning measurement in stages. Observe the images, then compare their length - which one is shortest? Which one is longest? Answer the questions at the bottom to complete the sheet. It's an easy way to help kids understand measurement basics.