It's always nice to hear from friends. Your budding mathematicians read letters from pen pals and convert customary measurements into metric units and vice versa. They also write letters to an imaginary pen pal using metric units.

In this exercise, students practice converting units (US customary). Students receive immediate feedback and have the opportunity to get hints and try questions repeatedly.

Practice converting a US customary measure of volume to a smaller unit. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.

Practice converting a US customary measure of length to a smaller unit. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.

Practice estimating the mass of real life objects using US customary units. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.

This task provides a context for translating between different units.Aligns with 4.MD.A.1.