# Resources

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## Rule of Three Calculator

A useful calculator for solving direct and inverse rules of three. It comes with an explanation of the different types of rules of three.

A rule of three is a method to find the fourth term of a propor ...

## Prime factorization calculator (Calculator.net)

Example of prime decomposition using 864 as the starting number. A great tool to learn how to decompose integers into prime factors. The prime factorization calculator, created calculator.net, offe ...

## Proportionality and percentages

A ratio is a comparison of two numbers. We generally separate the two numbers in the ratio with a colon (:) or write it as a fraction. A proportion is one equality with a ratio on both sides. A perc ...

## Proportions Using Cross Product? At grade

Identify proportions by cross multiplying or simplifying ratios.

It is an educational content of CK-12 Foundation (to access some of the CK-12 contents you must be logged in).

## Team WhiteBoarding with Twiddla - Painless Team Collaboration for the Web

Twiddla is a free, no-setup, web-based meeting playground. Mark up websites, graphics, and photos, or start brainstorming on a blank canvas. Voice and Text chat too!

Twiddla is a very intuitive collabo ...

## The Mayans

This program examines Mayan jaguar worship, Mayan gods who required human and animal sacrifice, and Mayan mathematicians who understood the concept of "zero" hundreds of years before Arab ma ...

## My Trip in a Time Machine – Writing Prompt

Your young writer will take a time trip in this writing prompt worksheet. _x00B_Where will he go, or more accurately, when will he go? Use it as a Common Core Standards exercise for middle school narr ...

## Narrative or Expository?

Week 35 Reading Comprehension (B-35). Reading segment about the difference between narrative and expository text. Cross-Curricular Focus: Study Skills. This worksheet is in line with Common Core Stand ...

## Tynker, coding for kids

Tynker provides everything needed to learn computer programming in a fun way. Tynker powers the creativity of over 60 million kids and serves thousands of schools and educators worldwide.

With 40+ awar ...

## History of Christmas Traditions Infographic

Across the world, Christmas is celebrated in a multitude of rich and cherished traditions. Their origins are wonderfully varied, emerging out of cultures and beliefs throughout history. This illustrat ...