Curated OER
Backwards Writing: Reflections and Symmetry
Why is "ambulance" written backwards on emergency vehicles? Young geometers apply principles of symmetry to translate words written backwards. See if your school or district subscribes to Jobland, where you can view a clip that explains...
Curated OER
Algebra Tic-Tac-Times
Use the strategy of working backwards to practice factoring polynomials and multiplying binomials in a game format. Play, and work to find which products combined with the available factors will result in the placement of four tokens in...
Curated OER
Working Backwards as a Problem-Solving Strategy
In this problem solving strategy instructional activity, 3rd graders roll a dice three times and record the number in the hundreds, tens and ones place on the chart, then solve an addition and subtraction problem with that number.
Common Core Sheets
Finding Side Length (Given Area)
Area is the amount of space that takes up the inside of a figure. To find the area of a rectangle, one must multiply the length by the width. Here, third graders are challenged to find the missing side length, given the area.
Common Core Sheets
Finding Side Length (Given Perimeter)
Perimeter is the total distance around an object. One can find the perimeter of a rectangle or square by adding all four side lengths together. These worksheets require third graders to find the missing side length, given the perimeter...
Curated OER
Addition Practice
For this addition worksheet, students solve and complete 5 different problems that include working backwards to get their answer. First, they use the strategy of working backwards to fill in the missing values on each mobile shown. Then,...
Curated OER
Number Sentences
Fifth graders become familiar with problem solving strategies of guess and check and working backwards. They demonstrate the basic concepts of addition, subtraction, multiplication, and division using a math sentence.
Curated OER
What's Missing?
Add a challenge for your young mathematicians' adventures in double-digit addition. Instead of simply computing sums in the 9 problems, they work backwards to fill in blanks among the addends. Resource makes a terrific extension or...
Curated OER
Mental Math Skills
In this mental math worksheet, students use a number line to count backwards and forwards, add doubles, add and subtract one, and add one-digit numbers. Students solve thirty problems.
Kenan Fellows
Multivariate Least Squares Regression Model with Variable Selection
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...
EngageNY
Percent Increase and Decrease
Increase the percent of pupils that are fluent in solving change problems with an activity that asks class members to look at problems that involve either increases or decreases and to express the change in terms of the percent of the...
Curated OER
Proving Quadrilateral Properties
Working backwards can sometimes help you see a path to solving a problem. In this chapter, properites of quadrilaterials are proven by looking at flowcharts and working the probem backwards. Worked through examples are given, along with...
Curated OER
Investigation - What's the Number?: Division
Seventh graders explore number sentences using a variety of strategies making each equation a true sentence. Students examine strategies such as patterns, trial and error, working backwards, and related problems. In groups, 7th graders...
Mrs. Glosser's Math Goodies
Circumference & Area Worksheet 1
Don't stress about creating your own problems and use this series of circumference and area worksheets. The problems ask pupil to plug diameter and radius into the formula to solve for area or circumference. The problems also have...
Mrs. Glosser's Math Goodies
Circumference & Area Worksheet 2
With plenty of problems to chose from, this series of worksheets provides you different types of area and circumference problems. Your learners can plug diameter and radius in to solve, or they can work backward when the area or...
Curated OER
Mental Maths
In this mental math practice worksheet, students fill in the 10 blanks as the count backwards and forward. Students also solve 20 addition problems.
Curated OER
4th Grade Math Study Guide
Fourth graders perform computation based on a cup of rice. In this rice math instructional activity, 4th graders complete math examples and problems using rice for manipulatives. Students participate in an online game based on rice math.
Curated OER
Math Challenges
Students participate in a series of challenging math lessons designed to engage their critical thinking skills. In these real-world problem solving lessons, student solve symmetry and repeated pattern problems, make lists/tables to...
Curated OER
Relate Counting to Addition and Subtraction
Your math scholars may recognize patterns, but do they know they can use them to practice addition and subtraction? This worksheet has scholars counting by threes, fours, and sixes to analyze number patterns and complete a sequence....
Curated OER
Geometry: Area, Scale Factor, Circumference
In this geometry worksheet, students solve 10 problems regarding area, scale factors, and circumference. Students, in 3 of the problems, are given the circumference and asked to work backwards to find missing information.
Charleston School District
Solving for a Missing Dimension
If a can has a volume of twelve ounces, how tall it should be? If you can work with volume formulas, it's is an easy measurement to find. After finding the volume of figures in the previous lesson of the series, learners now apply the...
Concord Consortium
Crazy Clocks
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...
Curated OER
Identifying Patterns
Investigators examine the clues to complete 17 sequences by skip counting backwards. There are two examples to get them started, and all of these patterns include the first three numbers but are missing the last five. If you want...
Justin Holladay
5 Dice: Order of Operations Game
Sometimes the simplest ideas can be the most challenging to solve! In this app, you are given five numbers and a set of operators, and you need to create an expression that when evaluated using the order of operations simplifies as the...