Tangrams | Grades 1+ | Constructing 2-dimensional shapes | 1.G.A.2 |

Shape Challenge, grade 2 and up | Grades 2+ | Constructing polygons | 2.G.A.1 |

Shape Challenge, grade 4 and up | Grades 4+ | Constructing polygons; the 4th grade version reflects students’ familiarity with angles and classifying triangles. | 3.G.A.1, 4.G.A.1, 4.G.A.2 |

Fractions | Grades 1 through 5 | This sequence takes students from very basic understanding of fractions all the way through multiplying and dividing by fractions. | 1.G.A.3, 2.G.A.2, 2.G.A.3, 3.NF.A.1, 3.NF.A.3,
4.NF.A.1, 4.NF.A.2, 4.NF.B.3, 4.NF.B.4, 5.NF |

3D Solid Understanding | Grades 2+ | Constructing and analyzing a rectangular and other prisms | 1.G.A.2 |

Angle Mania | Grades 4+ | Measuring angles, classifying triangles by angle types. | 4.MD.C.5, 4.MD.C.7, 4.G.A.1, 4.G.A.2 |

Ratios plain and golden | Grades 6 through 8 | Ratios and proportional relationships; Golden Ratio. | 6.RP.A.1, 7.RP.A.2 |

Volume and Cavalieri's Principle | Grades 6 through 8 | Volume and surface area. | HSG.GMD.A1, HSG.GMD.A2, HSG.GMD.A3 |

Triangles: similar, special, and right | Grades 8+ | Similar polygons, special triangles, Pythagorean Theorem, irrational numbers. | 8.NS, 8.G.A.4, 8.G.B.6, 8.G.B.7 |

Platonic and Archimedean Solids | Grades 1+ | Platonic and Archimedean solids | Enrichment topic |