A monthly set of problems targets a variety of ability levels.

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### Imani M. Goffney

### Edited by Naima F. Goffney

My name is Naima Goffney, and I am an eleven-year-old seventh grader at Julius West Middle School. I am taking algebra 1 this year. I wanted to write the Math for Real because in math class I do not always think that what we are learning is related to the real world. At home, my mom shows me all the different ways I am mathematically smart, which makes me want to try harder in school during the “rougher” days. We can use math to know more about how to improve our skills and find the math we learn in school more interesting and more related to our real world as middle schoolers.

### P. Reneé Hill-Cunningham

Hundreds of species of animals around the world are losing their habitats and food supplies, are facing extinction, or have been hunted or otherwise negatively influenced by humans. Students learn about some of these animals and explore multiple solution strategies as they solve this month's problems. Math by the Month features collections of short activities focused on a monthly theme. These articles aim for an inquiry or problem-solving orientation that includes four activities each for grade bands K–2, 3–4, and 5–6.

### Sarah Ferguson

Explore the creation of a unique problem-based learning (PBL) experience.

### Natasha E. Gerstenschlager and Jeremy F. Strayer

Short, mathematical discussions can elicit students' reasoning and focus on foundational ideas.

### Stephen Phelps

### Edited by Anna F. DeJarnette

A monthly set of problems is aimed at a variety of ability levels.

### Susan A. Peters, Michelle Gross and Amy Stokes-Levine

Redesigning a statistics unit allows seventh graders to produce an engaging and authentic investigation.

### Rick Stuart and Matt Chedister

While filling three-dimensional letters, students analyzed the relationship between the height of water level and elapsed time.

### Günhan Caglayan

The Platonic solids, also known as the five regular polyhedra, are the five solids whose faces are congruent regular polygons of the same type. Polyhedra is plural for polyhedron, derived from the Greek poly + hedros, meaning “multi-faces.” The five Platonic solids include the tetrahedron, hexahedron, octahedron, dodecahedron, and icosahedron. **Photographs 1a-d** show several regular polyhedra