Datum precedence is a fundamental principle in the design and manufacture of mechanical parts and assemblies.

It refers to the order of importance assigned to different datums, which are specific points, lines, or planes on a part, which are used as references for measurement and geometric tolerances.

In this learning object, students will learn about the attachment

process of specific sugars to red cell membranes and how the sugars

determine ABO antigenic activity.

In this animated and interactive object, learners observe how two, three, or four groups of electrons around the central atom cause the shape of the molecule to be linear, trigonal planar, bent, tetrahedral, or pyramidal. Seven examples and eight interactive questions are provided.

In this learning activity you'll create a focused speech topic by using a focused pyramid.

In this learning activity you'll review the general principles speakers use to create a specific purpose statement.

Students use the pyramid method to solve percent problems. The pyramid grid provides a visual way to set up the equation.

In this interactive object, learners examine standard and metric thread specifications used in engineering drawings. In a brief quiz, they identify various internal and external thread representations.

Learners examine the seven most common barriers to effective listening and consider suggestions for how to overcome these barriers. This interactive object contains audio.

Students practice adding some of the basic prefixes to words in the English language.

In this learning activity you'll define what a variable is, how they're used in the C# programming language, and how the computer works with variables under the hood.

Learners read about nonverbal communication. In a drag-and-drop exercise, they evaluate photos of people interacting and determine if the behaviors shown interfere with communication or enhance it.

In this learning activity you'll use Maslow's Hierarchy and choose which need is taking precedence and which is being sacrificed in each situation.

The learner will...review the process for successfully completing a weld procedure specification for weld testing in the educational setting.

In this learning activity you'll discover how constructors in the C# programming language are used to instantiate objects.

In this learning activity you'll be introduced to programming pointers compatible with both the C and C++ languages.

In this learning activity, you’ll explore the Data Definition Language (DDL) including its three main commands: CREATE, ALTER, and DROP.

In this learning activity, you’ll explore the Common Language Runtime, or CLR.

Explore what DML is including its main commands INSERT, UPDATE, DELETE, and SELECT.

In this learning activity, you’ll explore the characteristics of common, carbon steel shielded metal arc welding electrodes, which fall under American Welding Society specification A5.1.

Learners read and listen to phrases in Mandarin Chinese that would be part of directions to common locations. Additional vocabulary words related to forms of transportation are also presented.