Gear Ratio Concepts (Screencast)

By James Bourassa

In this screencast, learners examine the concept of gear ratios. The number of teeth, diameters, and velocity relationships are discussed and calculated using linear ratio equations.

Needs Vs. Wants

By Kristin Biekkola

In this learning activity you'll identify the difference between needs and wants related to building a personal budget.

Pythagorean Theorem

By Michele Williams

In this learning activity you'll use the Pythagorean Theorem to calculate the lengths of the legs and hypotenuse of a right triangle.

Ratios and Proportions

By Allen Reed, Douglas Jensen

In this interactive object, learners simplify ratios and solve problems using proportions. All terms are defined.

An Introduction to the Powers of 10

By Kevin Ritzman

The learner will evaluate powers of 10 with integer exponents and multiply decimal numbers by powers of 10 with integer exponents.

Converting Values in Engineering Notation

By Ron Wallberg

The learner will convert various values to engineering notation.

Identifying the Number of Significant Digits

Learners will identify the number of significant digits in practice problems.

Identifying Engineering Notation

The learner will represent very large and very small numbers in engineering notation.

Converting Numbers from Standard Form to Engineering Notation

Learners convert a number from standard form to engineering notation.

Standard-Position Angles and Reference Angles

The learner will recognize standard-position angles and find the reference angle for any standard-position angle.

An Introduction to Algebraic Word Problems

In this animated object, learners follow the steps for solving word problems using algebra. An introductory example is explained.

What Is a Radian?

By Roy Peterson

In this learning activity you'll explore a graphical depiction of a radian for angular measurement.

Units of Measurement

By Barbara Anderegg

In this learning activity you'll explore units of measurement.

Creating Histograms

By Mary Lee Rudnick-Kaun

Students follow steps to transfer data from a list to a histogram.

An Algorithm for Binary Subtraction

Students use the Base Minus One Complement method to perform binary subtraction. This learning activity has audio content and immediate feedback.

An Algorithm for Converting a Hexadecimal Number to a Decimal Number

In this animated and interactive object, learners follow two methods for converting a hexadecimal number to a decimal number. They test their knowledge in exercises at the end of the learning object.

Numerical Curiosities: Part 4

By Jeganathan Sriskandarajah

In this fourth part in a series, learners follow the steps of the “mathemagician” to examine three numerical curiosities: Be a Psychic by Predicting Birthdays, Predict a Card with Mind Reading, and Predict the Three Die Values Your Opponent Has Rolled. Learners will also study palindromic numbers and look at two alphametric puzzles.

Numerical Curiosities: Part 2

In part 2 of this series, learners follow the steps of the “mathemagician” to examine these numerical curiosities: The 189 Challenge; An Armstrong Number: What’s Special About 153? Is 495 Different or Indifferent? Is 6174 Different or Indifferent? It is always 618, and Beginning and Ending the Same.

Numerical Curiosities: Part 3

In this interactive object, part 3 in a series, learners follow the steps of the “mathemagician” to examine four numerical curiosities: What’s Special About 1089, Perfect Squares: 1089 and 9801, The Mathematical Significance of 1776, and The Calculator Number Game. The learner will also study six number patterns and look at one remarkable table. Immediate feedback is provided.

Math Reasoning: The Parts Room

By Dave Bunnow, Rosie Bunnow

Learners apply math problem-solving skills in a workplace simulation. This learning object has audio content.

Math Reasoning: Buying the Paint

By Rosie Bunnow

Learners use basic math skills in a workplace situation.

Statics - Trig: Law of Cosines Using a TI-86 Calculator

By Steve Whitmoyer

In this interactive and animated object, learners apply the Law of Cosines to determine forces using a TI-86 calculator.

Subtracting Binary Numbers by Adding the 2's Complement

In this learning activity you'll solve three binary subtraction problems using the 2's complement method.

Measuring Length in the Metric System (Mobile Version)

By Nabila Dahche

In this interactive lesson, students read about how units in the metric system are related to each other and practice locating measurements on a metric line.

Grouped Numerical Frequency Distributions: An Overview -- First in a Series

By Thomas Pomykalski

In this interactive object, students read about organizing data in a tabular form. A brief quiz completes the activity. This is the first in a series of six learning objects.