CK-12 Foundation
Stratified Random Sampling: An Extracurricular Study
Learning isn't a random process. A well-designed interactive lesson helps classes make key conclusions about stratified random sampling. They calculate group percentages and use those percentages to decide on sampling totals.
Mathed Up!
Stratified Sampling
Young mathematicians learn how to solve problems involving stratified sampling. They review concepts of sampling and proportionality by watching a video and then they complete a worksheet of questions on this topic.
Statistics Education Web
Sampling in Archaeology
Compare different random sampling types using an archaeological setting. Scholars collect data from an archaeological plot using simple random samples, stratified random samples, systematic random samples, and cluster random samples....
Radford University
The Next Big Thing
Make sure the next product is a hit. An engaging task has scholars design an item to sell at a sports event and then conduct a marketing survey. They decide whether to use random sampling, stratified sampling, or cluster sampling, and...
Teaching Women's History
Georgian Women
Britain was and is a stratified nation. History sleuths investigate the Georgian Era (1714-1830) of British history to gain an understanding of how the roles women played during this period were influenced by class, race, and religion....
Curated OER
Han Emperors in China
History can be so dramatic! Expose your class to the rise and fall of the Han Dynasty in China. The 400 year span of this Dynasty is covered in an easy to follow format, great for promoting food. Note test taking skills. Students will...
Curated OER
Hugh Miller's The Old Red Sandstone (1841)
Pollution has been an issue since the advent of stratified society. Learners will read this excerpt from Hugh Miller's The Old Red Sandstone (1841) then answer two document-analysis questions.
Curated OER
Plant Life of the Rainforest
Students study pictures of tropical rainforests and discuss its stratified character. Students then work with a partner to make a scale drawing of the rainforest strata.
Curated OER
What's in the Soil?
Second graders create stratified soil levels using pictures. In this earth science lesson, 2nd graders identify "artifacts" from 3 historic eras and divide them into 3 soil levels. Then they draw their own multi-level soil profile and...
Curated OER
Chronology: They Time of My Life
Students demonstrate the importance of intact information to achieve accuracy. They compare and constrast their timelines with the chronological information contained in a stratified archaeological site.
Curated OER
The Politics of Rocks and Minerals
Combine politics with science as the class discovers the intricacies of studying rocks and minerals.
Curated OER
The Wonders of Ancient Civilizations
Bring excitement and interest to your social studies with a unit on ancient civilizations.
California Academy of Science
Human Evolution
As the great and hilarious Tim Minchin once said, "Science is simply the word we use to describe a method of organizing our curiosity." Science is more than just a guess; it is based on questions, observations, and evidence. High...
Curated OER
Liquid Rainbow
Students develop their own techniques for drawing a small sample of solutions into a straw. They hypothesize ways to increase the density of water, and discuss how salt-free rainwater tends to float on top of salty seawater.
Curated OER
Transparent Shoebox Dig
Take this simulated archaeological dig one layer at a time with your young pupils to encourage observation, critical thinking, and careful attention. Using a transparent box full of layers of sand and artifacts, pupils examine the...
Curated OER
Layer Cake Archaeology
Excavating cake? Why not! Kids spoon into some layers and artifacts during this tasty hands-on activity. The cake, a simulated archaeological dig, is the object of observation and discussion.
Curated OER
Tissues
Complete with teachers' notes for most of the slides, this is a tremendous presentation of the four types of tissues: epithelial, connective, nerve, and muscle. Each is displayed with pertinent vocabulary and photos of microscope slides...
Curated OER
"Dead-Zones" and Coastal Eutrophication: Case-Study of Chesapeake Bay
Take an in-depth look at nutrient loading, eutrophication, and hypoxia using data on The Chesapeake Bay as an example. This comprehensive presentation includes detailed graphs, photos, and details about the changes in marine organism...
Curated OER
Sentence Completion 16
Develop vocabulary in your high school native speakers or in advanced non-native speakers. THere are only six multiple-choice questions shown, but each contains more than one tricky vocabulary word. Example words include: oblivious,...
Statistics Education Web
It’s Elemental! Sampling from the Periodic Table
How random is random? Demonstrate the different random sampling methods using a hands-on activity. Pupils use various sampling techniques to choose a random sample of elements from the periodic table. They use the different samples to...
Colorado State University
How Far Away Is Space?
Outer space may be a lot closer than you think! Science scholars model the layers of the atmosphere using transparencies to gain insight into the scale of space. The resource includes ideas to tailor the activity to the skill level of...
Boston University
South African Short Stories: Apartheid, Civil Rights, and You
How are short stories from South Africa connected to issues of civil rights in the United States? A unit plan uses South African short stories to discuss issues such as apartheid, colonization, and civil rights. Questions and activities...
Curated OER
Stacking Water
Students experiment with different salinities of water using straws and different colors of water. They collect and interpret data from the experiment.
Curated OER
Investigating Properties of Water: Temperature
Investigate how temperature affects the density of water and stratification that occurs in bodies of water when temperatures vary. Water of differing temperatures is given different colors to see the layers that form. The lesson is meant...