Curated OER
Law of Cosines
For this cosine worksheet, students will find the length of the third side of a triangle given the length of the other two side. Students will use the Law of Cosines to find the length of the missing side. Answers will be rounded to 3...
Illustrative Mathematics
How Many Leaves on a Tree?
This is great go-to activity for those spring or fall days when the weather beckons your geometry class outside. Learners start with a small tree, devising strategies to accurately estimate the leaf count. They must then tackle the...
Curated OER
Time
Students make a sundial. In this time instructional activity, students determine the time of the day by creating a sundial. They check the time on the sundial, hourly, for one week. Afterward, they explore what happened to the shadows in...
Curated OER
Estimating Percentages
In this estimating percentages worksheet, students read a problem that gives the percentage of a dollar amount, for example; 8.6% of $75.09 = $5.46. They estimate to determine if they believe the problem is "definitely wrong" or...
EngageNY
Rational Exponents—What are 2^1/2 and 2^1/3?
Are you rooting for your high schoolers to learn about rational exponents? In the third installment of a 35-part module, pupils first learn the meaning of 2^(1/n) by estimating values on the graph of y = 2^x and by using algebraic...
Balanced Assessment
Sales Tax Table
Sales tax rates vary; do the math to find the right rate! Pupils use before tax amounts and after tax amounts to determine the tax rate. Rounding makes the task challenging.
Curated OER
Estimating Fish Populations
Students describe the mark/recapture method used to estimate fish populations. They explain the importance of being able to predict population numbers.
Curated OER
Applied Mathematics I
In this applied mathematics worksheet, students solve 4 various sets of problems that include scalar equations, existence of solutions, and inverse problems. They determine the number of solutions of a problem shown and justify their...
Curated OER
Square Roots, Number Classification, Ordering & Graphing
Ninth graders identify numbers as rational or irrational. Using calculators estimation, and factoring methods, 9th graders compute the square root of numbers. They graph numbers in sequential order and round numbers integers to the...
Curated OER
Geometric Mean and the Pythagorean Theorem
In this geometric mean and Pythagorean Theorem learning exercise, 10th graders solve 9 problems related to determining the geometric mean by applying the Pythagorean Theorem in each problem. First, they find the geometric mean between...
Curated OER
Significant Figures
In this significant figures learning exercise, students indicate the number of significant figures and then round each to the number of significant figures shown. This learning exercise has 20 problems to solve.
Curated OER
Calories in a sports drink
How much can a company round numbers without being misleading? Learners investigate the accuracy of claims made by a sports drink company. Teachers could easily modify the activity by bringing in their own beverage bottles, or by taking...
Curated OER
Estimating With Fire
Students solve problems with percents, decimals and fractions. In this algebra lesson, students convert between fractions, percents and decimals. They estimate their answers and calculate their answer.
Bowland
AstroZoo
Rescue animals in the zoo by applying math concepts. Groups of learners solve three missions involving oxygen, food, and climate control. Each group selects an animal from one of four bio-domes.
Bowland
Royal Liver Clock
Using clocks as dining tables? Scholars estimate the number of people that can sit around the face of the clock on the Royal Liver Building in Liverpool. They use estimation to justify their responses.
EngageNY
Sampling Variability in the Sample Mean (part 1)
How accurate is data collected from a sample? Learners answer this question using a simulation to model data collected from a sample population. They analyze the data to understand the variability in the results.
Curated OER
Concept: Square Root
In this square root worksheet, students solve problems with exponents. They find the square root of given numbers. Students ill in missing numbers on a radical clock face. This eleven-page worksheet contains notes, detailed instructions...
Curated OER
How Many Stars in the Milky Way?
Students perform an experiment in which they will use a statistical method called `sampling' to count to a billion (and beyond). Students practice sampling by estimating the number of characters on a page from the classified section of a...
BW Walch
Creating Linear Equations in One Variable
The example of two travelers meeting somewhere along the road has been a stereotypical joke about algebra as long as algebra has existed. Here in this detailed presentation, this old trope gets a careful and approachable treatment....
101 Questions
Circle-Square
How do the area and perimeters of circles and squares compare? A clever video illustrates the change in the area of a circle and square while their total perimeter stays the same. The task is for learners to predict the point where the...
Curated OER
Squares and Square Roots
Learners find patterns relating the lengths of the sides of squares to their areas. In this squares and square roots lesson, students draw squares and find their areas. They estimate the sides of square when given the area. Learners use...
Curated OER
High School Mathematics Problems from Alaska: Cigarette Smoking
Students analyze the monetary cost associated with smoking. Students use statistics to determine life expectancy and cost associated with smoking.
Curated OER
Numerical Analysis/ Floating Point Arithmetic
In this math worksheet, students examine the concept of floating point arithmetic. They compare the tools of chopping and rounding to measure accuracy.
Curated OER
Decimals: checkbook and money
In this decimal learning exercise, students complete problems having to do with a checkbook, money, the cost of items, and more, with numbers containing decimals. Students complete 3 problems.
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