Simple Random Sampling
Ensuring every member of a population has an equal chance of being chosen for a sample.
PLIX
How Many Samples does it take to Change a Light Bulb? Interactive
Real World
Find out why many companies perform random drug tests.
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Math
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Adult Education
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FlexiA FREE Digital Tutor for Every Student
FlexBooks 2.0Customizable, digital textbooks in a new, interactive platform
FlexBooksCustomizable, digital textbooks
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Study GuidesQuick review with key information for each concept
Adaptive PracticeBuilding knowledge at each student’s skill level
SimulationsInteractive Physics & Chemistry Simulations
PLIXPlay. Learn. Interact. eXplore.
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NGSSConcepts aligned to Next Generation Science Standards
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