CK-12 Foundation
Properties of Equality and Congruence: Justifying Algebraic Steps
No need to justify using this resource. Learners drag justifications for each step of solving an equation in an interactive. To see if they are correct, all they need to do is use a slider and the correct answers appear.
Curated OER
Justifying Answers
Young scholars study story problems and learn how to find and justify their answers. They will use a story problem and then respond to the prompt questions from the teacher. They must add and subtract facts to 6 and learn how to justify...
K12 Reader
Justify Your Answer
How do you check to see if an answer to a question is correct? Just follow the four simple steps outlined in this reading comprehension worksheet.
EngageNY
Justifying the Geometric Effect of Complex Multiplication
The 14th lesson in the unit has the class prove the nine general cases of the geometric representation of complex number multiplication. Class members determine the modulus of the product and hypothesize the relationship for the...
West Contra Costa Unified School District
Divisibility Rules Justified
How do you know if a number is divisible? Instructors first prove the divisibility rules for three and four and then class members use this modeling to prove given divisibility rules for eight and nine either individually or in groups.
Alabama Department of Archives and History
The Wrong Side of History: How One Group Justified Its Opposition on the Freedom Riders and Civil Rights for African Americans
Designed as a supplement to the study of the Freedom Riders, this resource uses primary sources to reveal the views of those who opposed the Freedom Riders. After careful study of the arguments presented by the members of the Montgomery...
Illustrative Mathematics
Hexagonal Pattern of Beehives
Young geometers and biologists investigate the math of nature in an activity that is just the bee's knees. Participants will study the tessellations of hexagons in a beehive, along with the natural rationale behind the specific shape....
Bowland
Cats and Kittens
Can a cat have 2,000 descendants in 18 months? To determine if this claim is realistic, individuals must take different pieces of information into account when justifying their responses.
Mathematics Vision Project
Module 4: Equations and Inequalities
Can you justify that mathematically? Help learners see the process of solving as using mathematical properties rather than a set of steps to memorize in the fourth module of a nine-part Algebra I series. The module contains six lessons...
Curated OER
The Power of Graphical Display: How to Use Graphs to Justify a Position, Prove a Point, or Mislead the Viewer
Analyze different types of graphs with learners. They conduct a survey and determine the mean, median and mode. They then identify different techniques for collecting data.
Curated OER
Comparing Fractions
Learners compare three sets of fractions using the greater than, less than, and equal signs. To justify their answers, a drawing is also required that illustrates their reasoning. Including fractions with like and unlike denominators, as...
Curated OER
Justifying Answers
Students demonstrate how to solve word problems. In this problem solving lesson, students use strategies such as drawing pictures, using counters, and making a table to justify how they solved the word problem.
Curated OER
Six Solve Algebraic Properties and Justify Steps
In this solving linear equations worksheet, students solve six equations and justify each step of their proofs by stating the algebraic property used.
National Endowment for the Humanities
The House Un-American Activities Committee
Was the House Un-American Activities Committee justified in investigating subversive influences in the entertainment industry? Part two of the three-part series of lessons that examine the anti-communism movement after World War II,...
Curated OER
Toothpick Triangles
Explore patterns, variables, and mathematical relationships when you examine patterns with toothpicks and determine the next sequence of figures. Your class writes and justifies a formula based on the sequence. An answer key is included.
NPR
Civil Rights of Japanese-American Internees
Prompted by a viewing of Emiko and Chizu Omori’s Rabbit in the Moon, a documentary about the internment of Japanese-Americans during World War II, high schoolers examine a series of documents, including the Bill of Rights and the UN’s...
Curated OER
Modeling Conditional Probabilities 1: Lucky Dip
Check out this detailed lesson plan on conditional probability! Learners work individually and also collaboratively to analyze the fairness of a game and justify their reasoning. it includes detailed notes and many helpful suggestions...
Project Tahoe
Individual Rights vs. The Greater Good Within the Scope of War
When, if ever, is the government justified in restricting individual rights? When, if ever, should the "greater good" trump individual rights? To prepare to discuss this hot-button topic, class members examine primary source documents,...
Teachers Development Group
Habits of Mind Interaction Posters
From generalizing and justifying to megacognition reflection and perseverance, keep the 16 Habits of Mind as part of an ongoing and developing conversation in your class by displaying these posters around your room throughout the school...
Core Knowledge Foundation
Unit 3: Adventures of Don Quixote
Fifth graders explore the Adventures of Don Quixote in a four-week language arts unit. Scholars listen to and discuss a new chapter each day as well as examine vocabulary and practice word work including suffixes, subject-verb agreement,...
Curated OER
Investigation-Reasoning and Proof
Third graders determine the outcome of each of the following situations and justify their findings: even number + even number = ?, even number + odd number = ?, odd number + odd number = ?, and odd number + even number = ?.
National Endowment for the Humanities
Lesson 2: Religion and the Argument for American Independence
Young scholars examine how religion affected arguments justifying American independence. They read and analyze primary source documents, and write an essay analyzing how Americans used religious arguments to justify revolution against a...
Inside Mathematics
Quadratic (2006)
Most problems can be solved using more than one method. A worksheet includes just nine questions but many more ways to solve each. Scholars must graph, solve, and justify quadratic problems.
Curated OER
Using Fairy Tales to Debate Ethics
Is trickery ever justified? Is it okay to steal from someone who has stolen from you? Puss, from Puss in Boots, and Jack, from Jack and the Beanstalk, might have some ideas about these ethical questions. After listening to a series of...
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