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A Collapsible Compass
Sometimes an article or an activity provides the stimulus for further investigations or explorations. Such was my reaction when I first read that a “collapsible compass” was used by Euclid instead of a “modern compass” to deduce his theorems in his book, Elements, which is considered one of the most influential works in the history of mathematics. You may use this activity to challenge yourself to show the equivalence of the “collapsible compass” with the “modern compass,” or challenge your m
9th - 12th
Geometry
How Tall Is It? — MYP Mathematics Field Activity | Similar Triangles & Trig
A 75-90 minute outdoor field activity for MYP Mathematics students covering similar triangles and trigonometry (angle of elevation). Students choose a tall object nearby, then find its height twice — once using the mirror method (similar triangles) and once using a clinometer app (trigonometry). They record measurements on labelled diagrams, show full working, and compare both results with a structured reflection. What's included: 6-page print-ready PDF When to use it: After teaching both simila
8th - 10th
Geometry, Measurement, PreCalculus
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2D Shape Identification and Sorting | Early Childhood Montessori Geometry Game
Introduce early geometry concepts with this fun, tactile, and hands-on 2D Shapes Matching Activity Pack!Help your early learners build strong spatial awareness and shape identification skills with this interactive math resource. The "I Know Shapes" activity features friendly, engaging, and colorful designs to help children move beyond simple visual recognition into active geometry classification and fine motor manipulation. Perfect for preschool morning work, independent math centers, daily morn
PreK - 2nd
Geometry, Measurement, Other (Math)
Frankenstein 2D Shape Matching Mats | Halloween Math Center Activity
Shape practice just got a little monster-ous! With these Frankenstein Shape Matching Mats, kids will have a blast building silly Frankensteins while practicing shape recognition. Perfect for preschool and kindergarten learners, this hands-on Halloween activity makes shape practice monster fun. ✅ Promotes shape recognition ✅ Strengthens fine motor skills ✅ Encourages independent play What's Included: 12 shapes: triangle, trapezoid, square, heart, star, circle, rectangle, pentagon, hexagon, ova
PreK - 1st
Geometry
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