Explore what DDoS attacks are, the methods used to carry them out, and how to prevent them.

In this learning activity you'll practice converting between degree minute second and decimal degree.

Learners view two animations that show the effects of eddy currents.

In this animated object, learners follow an analogy of water flowing through pipes and valves to see how current increases in a parallel circuit as branches are added.

In this learning activity you'll examine how logical addresses work. The IP address is the logical address assigned to a connection by the ISP or network administrator.

Students locate the countries of Turkey, Syria, Lebanon, Israel, and Jordan on a map in this interactive learning object.

In this animated object, learners study the operation of a ladder circuit that controls the rotational direction of a DC motor.

Learners follow the steps for adding and subtracting signed numbers and complete practice exercises.

This interactive object is designed to help learners memorize the schematic symbols used in ladder logic diagrams. Learners quiz themselves using electronic flashcards.

In this learning activity you'll review how a local area network computer uses a subnet mask to determine if its message is intended for a computer on the same network or on a remote network.

Learners examine how a ladder logic circuit becomes latched when a normally open pushbutton is momentarily pressed.

In this learning activity you'll analyze the costs of rent-to-own buying plans and compare those plans to other consumer strategies.

Learners follow steps to add fractions with different denominators. They also review fraction concepts, do a drag-and-drop exercise involving fraction terms, and add fractions with common denominators.

In this activity, you'll identify ways to prevent and address sexual harassment.

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

Learners will identify ladder logic diagrams and the logic functions they perform.

In this interactive object, learners read a description of value-added and non-value-added activities and then place various work duties into these two categories.

Learners read definitions of the terminology associated with algebraic operations and then follow steps to simplify algebraic expressions.

In this learning activity you'll examine the format of an IP address and interpret the octet by converting between decimal and binary numbers.

In this interactive object, learners follow step-by-step instructions for reducing algebraic fractions, which contain addition and/or subtraction, to their simplest form. This activity has audio content.