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West Contra Costa Unified School District

Dividing Numbers

For Students 3rd - 6th Standards
Three pages make up a reference page designed to help parents understand the concept of division. Division strategies are showcased using detailed descriptions and labeled examples. 
Activity
Bowland

You Reckon?

For Teachers 6th - 9th
Sometimes simple is just better. A set of activities teaches young mathematicians about using plausible estimation to solve problems. They break problems down to simpler problems, use rounding and estimation strategies, and consider...
Interactive
CK-12 Foundation

Determination of Unknown Triangle Measures Given Area: Jib Sheets

For Students 10th - 12th Standards
Solving triangles is a breeze. Young boat enthusiasts solve problems involving triangles in the context of sails on a boat. They must apply different strategies, including the Law of Cosines and area formulas.
Activity
Education Development Center

Factoring a Degree Six Polynomial

For Students 9th - 10th Standards
Within collaborative groups, scholars factor a degree six polynomial. They can factor the polynomial using many different strategies — a great way to prompt mathematical discussion.
Activity
Education Development Center

Creating Data Sets from Statistical Measures

For Students 6th - 7th Standards
Explore the measures of central tendency through a challenging task. Given values for the mean, median, mode, and range, collaborative groups create a set of data that would produce those values. They then critique other answers and...
Activity
Education Development Center

Choosing Samples

For Students 6th - 7th Standards
What makes a good sample? Your classes collaborate to answer this question through a task involving areas of rectangles. Given a set of 100 rectangles, they sample a set of five rectangles to estimate the average area of the figures. The...
Activity
Education Development Center

Absolute Value Reasoning

For Students 6th - 7th Standards
Teach solving absolute value inequalities through inquiry. Groups use their knowledge of absolute value and solving inequalities to find a solution set to an absolute value inequality. Working collaboratively encourages discussion,...
Assessment
Illustrative Mathematics

Comparisons 1

For Students 2nd Standards
A seven question worksheet asks learners to use place value strategies to decide if each number comparison is true or false.
Assessment
Illustrative Mathematics

Using Place Value

For Students 4th Standards
Learners count by tenths, hundredths, or tens in a task that uses decimal place value strategies. The young mathematicians then use <, >, or = to make correct comparisons between expanded decimal notations.
Lesson Plan
Kenan Fellows

Multivariate Least Squares Regression Model with Variable Selection

For Students 9th - 12th Standards
The risk of contracting an infection in the hospital is low, but it does happen. Learn what risk factors have the highest correlation with hospital-acquired infections in the final lesson of a three-part series. Using the open source R...
Activity
5280 Math

Triangle Area Patterns

For Teachers 8th - 10th Standards
Combine algebraic and geometric strategies to find solutions. The task asks learners to find the coordinates of a third vertex of a triangle to create a triangle with a specific area. The project is a set of seven problems that...
Assessment
Concord Consortium

Crazy Clocks

For Students 5th - 7th Standards
While a stopped clock is right twice a day, a fast or slow clock confuses people for weeks. Scholars observe a clock running slow and must correct it before observing a clock running fast and working it backward. Finally, a multi-step...
Activity
Didax

Pi Day #1a – Discovering Pi

For Students 6th - 10th Standards
Unravel the mystery behind the infamous number pi. Scholars complete a series of activities that explores where pi comes from, its digits and estimation strategies. Pupils should be ready to measure, calculate, and look for patterns to...
AP Test Prep
College Board

Beginning the Year with Local Linearity

For Teachers 10th - 12th
Local linearity isn't the first thing that comes to mind to start off an AP® Calculus course. A scholarly article discusses one possible beginning to the AP® Calculus course: investigating and introducing derivatives through activities...
Activity
Education Development Center

Comparing Fractions

For Teachers 4th - 6th Standards
Three heads are better than one. After reading a conversation between three friends about how to compare fractions, scholars analyze and discuss each presented strategy. These include using unit fractions, using benchmark fractions,...
Performance
Radford University

REALLY Tall!

For Teachers 9th - 12th Standards
Conduct indirect measurements three ways. Working in groups, pupils come up with different ways to measure three tall objects indirectly. The teacher provides measurement information requested by the teams, and learners then calculate...
Performance
Radford University

Marking Starting Locations for the 400-Meter Dash Track and Field Event

For Teachers 9th - 12th Standards
No fair! I had to run more than they did! Young mathematicians first measure various lengths on a school track. They develop strategies and show calculations to prove that all participants will run the same length using a staggered...
Interactive
Curated OER

We Can Solve This Problem

For Students 5th
In this problem solving strategy learning exercise, 5th graders answer ten multiple choice questions about the steps of solving a word problem. This is an interactive learning exercise.
Lesson Plan
Curated OER

Estimate, Solve, and Check

For Teachers 1st - 2nd
Young scholars estimate, solve, and check a series of addition and subtraction number and word problems. They write their estimates on a recording sheet, compute and write the answer in the next column, and check their answer with a...
PPT
Curated OER

Problem Solving and Puzzles: 3

For Teachers 4th - 5th
Your class can use this to warm up or to discuss their problem solving strategies. They review the 8's times tables, relate the multiplication problems to division, then use a chart to solve a word problem involving money.
PPT
Curated OER

Teddy Bear Subtraction

For Teachers 1st - 2nd
Do this exercise to prime early learners for a day of subtraction. They discuss problem-solving strategies, listen to a story problem involving teddy bears, then go to their assigned math station. This is a great way to prime the day.
Printables
Didax

Multiplication Facts

For Teachers 3rd - 5th Standards
Learning their multiplication facts is a big step in the education of young mathematicians. Help achieve this goal with the support of this collection of instructional materials.
Lesson Plan
Novelinks

The Little Prince: Picture Book Strategy

For Teachers 6th - 8th Standards
Picture books aren't just for children; they carry strong, valuable messages for adult as well. Explore the audience for Antoine de Saint-Exupéry's The Little Prince with a lesson that compares picture books to literature...
Worksheet
Curated OER

Repeated Subtraction

For Students 1st - 3rd
Learners can find the difference using repeated subtraction. This set of 6 word problems encourages them to use repeated subtraction as the primary problem solving strategy.

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