Illustrative Mathematics
Guess My Number
Make a game out of solving equations. This particular activity works well for pairs of learners. Follow the instructions to have player one pick a number and player two verbally give an equation. Participants need to make sense of a...
Southwestern Medical Center
Field Epidemiology: Investigation of an Unknown Disease
More than 90 percent of the people in a building have come down with an illness, and it is your job to investigate. Teachers give scientists the data needed to decide what is important and how they can solve the mystery. The exercise is...
CK-12 Foundation
Pythagorean Theorem for Solving Right Triangles: Solving the Triangle
Observe the change in the trigonometric ratios as angles vary. An interactive provides the values of trigonometric ratios for both acute angles in a right triangle. Pupils create a right triangle to match given criteria and find the...
Curated OER
Using a Controlled Experiment to Identify Two Unknown Plasmids
Student demonstrate knowledge of recombinant DNA techniques (restriction enzyme digest, gel electrophoresis, and staining gel). They demonstrate skills needed to complete a gel electrophoresis and interpret a stained gel. Pupils solve...
Curated OER
Solve for the Unknown
In this unknown instructional activity, students solve simple one-step algebraic inequalities. This two-page instructional activity contains 6 simple problems. Answers are provided on the last page.
DataWorks
4th Grade Math: Multi-Step Word Problems
Solving word problems requires reading comprehension and math computation. Through an interactive slideshow presentation, fourth graders observe and follow each step toward solve multiplication and division word problems.
EngageNY
Word Problems Leading to Rational Equations
Show learners how to apply rational equations to the real world. Learners solve problems such as those involving averages and dilution. They write equations to model the situation and then solve them to answer the question — great...
CK-12 Foundation
Determination of Unknown Triangle Measures Given Area: Jib Sheets
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.
Curated OER
Subtraction and Unknown Addends
The missing addend strategy is helpful to young mathematicians approaching subtraction. This worksheet walks learners through the required steps, solving the problems with them. They examine situations with one addend and a sum provided,...
Curated OER
Problem-Solving Strategy: Use Logical Reasoning
In this logical reasoning instructional activity, students utilize the problem-solving strategy of logical reasoning to answer 2 short answer mathematical questions.
Curated OER
Algebra: Solving Equations
In this solving equations worksheet, students write stories for given equations. They solve for the unknown. This one-page worksheet contains 8 problems.
Curated OER
Solve Algebraic Equation Worksheet
In this algebraic equation learning exercise, students solve simple algebraic equations containing integers and fractions. They solve for the unknown. This four-page learning exercise contains 20 multi-step problems.
Curated OER
Developing the Concept: Percents
In this percents instructional activity, learners review how to solve a multiplication equation where they must solve for a variable. They solve equations with missing numbers and percents.
NOAA
Journey to the Unknown
What's it like to be a deep-sea explorer? Tap into the imaginations of your fifth and sixth graders with a vivid lesson, the second part of a six-part adventure. Learners close their eyes and submerge themselves in an expedition aboard...
Curated OER
Bingo - Solving Equations
In this solving equations worksheet, students simplify equations containing fractions and variables on both sides and then solve for the unknown. This two-page worksheet contains 25 multi-step problems.
Curated OER
Solving Single-Step Word Problems
Math wizards learn the five-step plan to solve math word problems. They investigate the five-step process for solving word problems, and examine the use of code words for each of the operations and solve a problem using the strategies.
Curated OER
2001 U.S. National Chemistry Olympiad Part III
Here is a comprehensive method for assessing chemistry learners' knowledge; have them approach two laboratory problems, plan their methods of solving each, and then actually carry out the experiments to find the answers. Both the...
Curated OER
Unknown Addends (to 20): Count the Blank Boxes
By filling in the blank squares, learners complete five addition number sentences both visually and numerically. For each problem, a frame is filled with a certain number of images (turkeys, candles, etc.) and a certain number of blank...
Curated OER
Unknown Numbers in Sums and Differences
Beginners to addition and subtraction will have fun with these three word problems, which have accompanying visuals. They complete one problem with a missing difference, one with a missing sum, and a third with a missing subtrahend....
Curated OER
Solve for the Unknown
In this algebra worksheet, students solve for the unknown or x-value. They perform logarithmic equations using the properties of logs. There are 5 questions with an answer key.
Curated OER
Solving Linear Equations
Ninth graders solve linear equations. In this algebra lesson plan, 9th graders discuss the steps for solving linear equations and work through examples with the teacher. They work in pairs to create their own linear equation and complete...
Curated OER
Solving Quadratic Equations with Square Roots
In this quadratic equations worksheet, students solve quadratic equations containing square roots. They combine like terms and solve for the unknown. This four-page worksheet contains 28 problems. Answers are provided on the last two pages.
Curated OER
Solving Muti-Step Equations
In this algebra worksheet, students solve multi-step equations and try to find the unknown. They add or subtract, and then multiply or divide to get their answer. There are twenty-one questions with an answer key.
Curated OER
Solving Equations Mixed Review
Students solve linear equations with two steps. In this algebra lesson, students isolate the variable and solve for the unknown using division, multiplication, addition and subtraction.
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