For this lesson, students work in pairs to search for the missing addend to complete a mathematical sentence.

For this assessment task, students analyze two equations written in different ways. Students solve both equations and explain their thinking.

For this task, students compare numbers that are identified by word names and not just digits. Students must think carefully about the value of the numbers due to the different order numbers.

For this task, students use the digits 2, 5, and 7 to create 3-digit numbers to determine the greatest number they can make and the smallest number.

In this video segment from Cyberchase, the CyberSquad is shooting a film. On their fourth day of filming, they hope to shoot an extra scene, which means their film supply costs will go up. They look at their budget and find that if they lower their crew costs, they can film the extra scene without going over their budget for the day.

For this interactive, students find the missing addend/subtrahend for each equation to see how many shots they can make within the time limit. Please note you will need to have flash enabled on your browser to use the resource.

Students work in teams to follow criteria and constraints to design their own container that holds pompoms (popcorn). When this is completed they need to test and record how many pom-poms their container will hold. Students find that counting and organizing groups of ten is the best way to do this. They record their information on a data analysis sheet and the following day they compare their numbers and amounts.

For this assessment task, students skip count by 1's,5's,10's, or 100's to fill in the missing numbers.

For this task, students compare three digit numbers and explain their comparisons using pictures.