Learners examine an animated motion-controlled robotic arm and observe the operation of a PID (Proportional-Integral-Derivative) control that makes movements quickly without overshooting or having a steady-state error. This activity has audio content.

Learners apply lever ratios to calculate the mechanical advantage in basic mechanisms.

Students read about light-emitting diodes, including LED voltage and current, and how to protect against reverse voltage.

Learners study the theory of operation for a ratio pyrometer that measures temperature. A short quiz completes the activity.

In this learning activity you'll identify the various parts of a bar graph, read and interpret its data, and calculate the data to solve various application problems.

Students read the rules used in multiplying and dividing signed numbers. They view examples and work practice problems.

Students read how to organize their work when multiplying more than two signed numbers. A review and practice problems complete the activity.

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

Learners read the definitions of working capital, current ratio, quick ratio, return on equity, accounts receivable turnover, and inventory turnover.

I numeri amici

Sort the Dewey numbers from the smallest to largest number.

რიცხვების შედარება; ოცეული,ათეული,ერთეული.

Spanish numbers 1-100