This activity uses MLR4 Information Gap.

The Information Gap structure requires students to make sense of a problem by determining what information is necessary, and then to ask for information they need to solve it. This may take several rounds of discussion if their first requests do not yield the information they need (MP1). This process also allows students to refine the language they use and ask increasingly more precise questions until they get the information they need (MP6). This Information Gap provides students an opportunity to solve multiplication and division problems involving weight.

• “What parts of the problem helped you make sense of the situation?”
• “Which quantities were important?”
• “Did anyone solve the problem in a different way than their partner?”

This activity uses MLR4 Information Gap.

In this activity, students solve addition and subtraction problems involving weight.

• “What kinds of questions were the most useful to ask?”
• “Were there any questions you weren't sure how to answer?”
• “How did you represent your reasoning once you realized you needed to add (or subtract)?”