**FEATURES** |

Prisms and Pyramids: Constructing Three-Dimensional Models to Build Understanding
*Beverly Koester* A variety of activities in which fourth-grade students investigate prisms and pyramids by building models from folded paper and drinking straws. |

Algebraic Problem Solving in the Primary Grades
*Robert Femiano* Three types of mathematics problems that are useful in promoting algebraic reasoning in the elementary school. |

Building a Community of Mathematicians
*David Whitin, Phyllis Whitin* How using the familiar "Magic Triangle" puzzle with a class of fourth-grade students contributed to the development of a supportive mathematical community. |

Integrating Music and Mathematics in the Elementary Classroom
*R. Edelson, Gretchen Johnson* Classroom ideas for integrating music with the teaching of mathematics. |

Mathematical Mind Journeys: Awakening Minds to Computational Fluency
*Susan Ebdon, Mary McGee Coakley, Danielle Legnard* "Mathematical Mind Journeys" is a lesson format that promotes computational fluency through variable practice that relies on mathematical memory rather than rote memorization. |