The** Turkey Investigation project **is part of a research program by Catherine Fosnot, dealing with inquiry-based learning in mathematics. Grade 3-5 students work on problems related to multiplication and division.

The problem is typically related to the American context. Here follows the short description.

*Turkey Investigations, Grade 3–5: A Context for Multiplication invites you into Dana Ostrowsky’s**third-grade classroom. Here children explore two problems that are posed*

*separately by Dana. In Buying the Turkey, the first problem presented to the class, students*

*grapple with the cost of a 24-pound turkey that is priced at $1.25 per pound. In*

*the next problem, Cooking the Turkey, students think about how long to cook the 24-*

*pound turkey if, as one recipe suggests, it needs to roast for fifteen minutes per pound.*

*Because the numbers in each problem—the relationship between a quarter of a*

*dollar and a quarter of an hour—*

**have been carefully crafted to support**the use of similar*kinds of grouping*

**strategies**(e.g., grouping four quarters to make a dollar in Buying*the Turkey and putting four fifteen-minute intervals together to make an hour in*

*Cooking the Turkey), there is the potential for students to*

**model the problems**in similar*ways.*

*The challenges presented by these two problems to students who are making their*

*first forays into multiplication push students to look for shortcut strategies and support*

*the development and the discovery of specific mathematical big ideas (e.g., the distributive and associative*

*properties of multiplication) and landmark strategies (e.g., repeated addition,*

*skip counting, doubling and halving, etc.). As*

**students struggle**with these problems*they also develop different ways of modelling them. This includes the ratio table, the*

*open number line, and the double number line.*(A. Cameron, S.B. Hersh and C. T. Fosnot, 2005)

You can watch a part of the series of videos below. This may inspire you to look for problems that are interesting for your pupils and can be designed to challenge them.