# Collections

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##### Whimsical Clocks Ch.2 Abacus Clock

Like your hands, an abacus lets you count in fives and tens. The first pair of columns are for hours, the second pair for minutes and the third pair for seconds. The bead at the top of each column counts for 5 single beads. The beads in the main compartment of the left column each count for 10 single beads. The bead in the top compartment, left column, counts as 50.##### Common Core Nuggets: Equivalent Expressions 7.EE.1

This collection contains apps that will help teachers implement Common Core Standard 7.EE.1 for 7th grade mathematics.##### NWMC 2013

Apps for presentation entitled "Creating electronic handouts and assessments as browser, tablet or smartphone apps"##### Generalizations of a Theorem from Archimedes Liber Assumptorum

The first diagram is from Archimedes' Liber Assumptorum (book of Lemmas). The later diagrams are generalizations to conics.##### Whimsical Clocks Ch4 Kaleidoscope Clock

A Kaleidoscope works as a combination of reflections. Mirrors are typically arranged in an equilateral triangle producing multiple reﬂections as a symmetric pattern which changes as the triangle rotates. The apps in this collection explain how it's done, and then, of course, turn the kaleidoscope into a clock!##### Euclid\'s Elements Books 1-4

Several of these exist already, but these are my favorite apps from the original book. -Andrew##### Whimsical Clocks Ch.3 Binary Clock

Our binary digital clock has 3 sections, red beads for hours, purple for minutes and cyan for seconds. Beads in the up position represent the binary digit 1, beads in the down position represent 0. In addition to the Binary Clock, we've provided a Binary Test app to practice your binary numbers.##### Using Force to Crack Some Geometry Chestnuts

Some apps illustrating Philip Todd's Presentation*Using Force to Crack Some Geometry Chestnuts*by Mark Levi

##### Common Core Nuggets: Trigonometric Functions

This collection contains apps that will help teachers implement Common Core Function Standard F-TF 2, 3, 5 for High School Mathematics. Apps with an * indicate that they address the modeling standard.##### Wolfram Technology Conference

Apps accompany Phil Todd's presentation: "Symbolic mechanics: from optimal trebuchets to simple chaotic machines"##### Common Core Nuggets: Building Functions

This collection contains apps that will help teachers implement Common Core Functions Standard F-BF 3 for High School Mathematics.##### Euclid's Elements-Basic Constructions

These apps are taken from Book I of Euclid\\\'s Elements. Proposition 1 shows how to construct an equilateral triangle. Proposition 2 demonstrates how to create a straight line equal to a given straight line. Finally, proposition 3 teaches how to cut off a straight line that is equal to a given line from a larger line.##### Common Core Nuggets: Quadratic Zeros

This collection contains apps that will help teachers implement Common Core Algebra Standard A-SSE 3a for High School Mathematics.##### Common Core Nuggets: Conics

This collection contains apps that will help teachers implement Common Core Geometry Standard G-GPE 1, 3 for High School Mathematics.##### Proportional Puzzlers

A collection of puzzlers that involve points that are located proportionally by functions or constants on curves.##### Common Core Nuggets: Pythagorean Theorem 8.G.6

This collection contains apps that will help teachers implement Common Core Standard 8.G.6 for 8th grade mathematics.##### Euclids Elements

A selection of illustrations from a few propositions in Books 1, 2 and 6 of Euclids Elements##### Finding the Fermat Point by Physics and by Transformation

These apps accompany the presentation**Finding the Fermat Point by Physics and by Transformation**in the

*More Favorite Geometry Proofs*session at MathFest 2014