Curated OER
The Part-adder 1
Second graders investigate the addition of whole numbers. They mentally perform calculations involving addition and subtraction. They make sensible estimates and check the reasonableness of answers.
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The Basketball Tournament
Students estimate how many games are played if six teams play each other once. They investigate their own way and discuss possible strategies they might use. They then share their findings with the class.
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The Take-Awar Bar 1
Students use an Internet tool, "The Take-Away Bar" to solve subtraction problems by breaking them into parts. They write and solve comparison problems. Students make sensible estimates and check the reasonableness of answers. They use...
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The Difference Bar 2
Students use Internet software, The Difference Bar, to work out the difference between two numbers by breaking numbers into parts. Students use mental strategies to work out the difference between any 2 two-digit numbers. Students...
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Take Away Bar 2
Students use an Internet tool, The Take-Away Bar" to solve subtraction problems. They use mental strategies to subtract a two-digit number from a larger two-digit number. Students write and solve subtraction problems. They describe...
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Think of a Number
In this math worksheet, students engage in a mental math activity. Student think a number and follow several computations with that number and always come up with the answer 9. Students discuss why this happens.
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Handling Data: Comparing Distributions
Learners gather information by analyzing graphs, diagrams and pie charts. In this graphs and diagrams lesson, students complete addition and subtraction problems. Learners discuss a pie chart. Students use information to crate a stacked...
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Handling Data: Probability
Fourth graders find and justify probabilities and approximations. In this repeating experiment, 4th graders complete a worksheet after rolling die and tossing coins to determine outcomes.
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Math: "Scales"
Third graders investigate ratios and rates. In this third grade mathematics lesson, 3rd graders identify equal ratios and rate and test for proportionality. This lesson is created to be use in conjunctions with a particular textbook,...