21st Century Lessons: A Boston Teachers Union Initiative
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Resources

Common CoreCommon Core
Evaluating Expressions: The Order of Operations by 21st Century Lessons: A Boston Teachers Union Initiative
Most PopularLesson plan, Curriculum/Scope & Sequence, Assessments, Handout
Evaluating Expressions: The Order of Operations. This is the first lesson of a unit series on the order of operations. This lesson is an exploration around the order of operations with practice. The goal for this lesson is for students to …

Common CoreCommon Core
Introduction to Ratios by 21st Century Lessons: A Boston Teachers Union Initiative
PopularLesson plan, Instructions for teachers, Other, Handout
Introduction to Ratios. This lesson will start with reviewing simplifying fractions and then ask students to represent realworld situations as fractions. Students can follow the PowerPoint with the structured notes provided. We will launc…

Common CoreCommon Core
Writing Algebraic Expressions by 21st Century Lessons: A Boston Teachers Union Initiative
PopularLesson plan, Curriculum/Scope & Sequence, Assessments, Handout
Writing Algebraic Expressions. This lesson is the third part of the entire unit and the first of two lessons where students will start writing algebraic expressions. This lesson is designed to develop students' ability in writing algebraic

Common CoreCommon Core
Review of Ratios and Rates Unit by 21st Century Lessons: A Boston Teachers Union Initiative
PopularLesson plan, Curriculum/Scope & Sequence, Other, Activity
Review of Ratios and Rates Unit. This lesson serves as a complete review of the ratio unit. Students will begin class with a highinterest launch and will brainstorm realworld connections that have been made to ratios and rates. We will t…

Common CoreCommon Core
Introduction to Rate and Unit Rate by 21st Century Lessons: A Boston Teachers Union Initiative
PopularLesson plan, Curriculum/Scope & Sequence, Other, Handout
Introduction to Rate and Unit Rate. This lesson will first review the idea of ratio and then connect this idea to rate and unit rate. We will use a studentfriendly video on a skateboarding bulldog to engage students in learning. Then we w…

Athens and Sparta Lesson 1 by 21st Century Lessons: A Boston Teachers Union Initiative
PopularLesson plan, Curriculum/Scope & Sequence, Other, Activity
Athens and Sparta Lesson 1. This lesson is a series of short independent activities paired with cooperative work with a small group or partner. At the close of the lesson, students will have a grasp of the basic differences in the culture …

Common CoreCommon Core
Writing Algebraic Expressions 2 by 21st Century Lessons: A Boston Teachers Union Initiative
Lesson plan, Curriculum/Scope & Sequence, Assessments, Handout
Writing Algebraic Expressions 2. Part four of the whole unit, this is the second lesson where students will continue their learning of translating written expressions and writing algebraic expressions. This lesson focuses more on how to tr…

Common CoreCommon Core
Surface Area of a Rectangular Prism 1 (of 2) by 21st Century Lessons: A Boston Teachers Union Initiative
Lesson plan, Curriculum/Scope & Sequence, Other, Activity
Surface Area of a Rectangular Prism 1 (of 2). This lesson is bookended with a comical context designed to engage students and provide a reason for the direct instruction. Animation and color coding are used to highlight the structure of a …

Common CoreCommon Core
Evaluating Expressions: The Order of Operations 2 by 21st Century Lessons: A Boston Teachers Union Initiative
Lesson plan, Curriculum/Scope & Sequence, Assessments, Handout
Evaluating Expressions: The Order of Operations 2. This is the second lesson in the whole unit and it covers all aspects of the order of operations. The main objective of this lesson, besides more practice with the order of operations, is …

Common CoreCommon Core
Grade 6 Math Lesson: Ratio Tables and Graphing by 21st Century Lessons: A Boston Teachers Union Initiative
Lesson plan, Curriculum/Scope & Sequence, Other, Activity
Grade 6 Math Lesson: Ratio Tables and Graphing. This lesson will first review students’ knowledge of applying ratio tools to solve realworld problems. We will first look at a recipe and ask students to answer questions about making multip…

Common CoreCommon Core
Ratios and Vocabulary by 21st Century Lessons: A Boston Teachers Union Initiative
Lesson plan, Curriculum/Scope & Sequence, Other, Activity
Ratios and Vocabulary. This lesson will begin with a review of how to write ratios and then focus on how students can write ratios in sentence form. Students will start the lesson with a launch of watching a video that uses ratio language.…

Common CoreCommon Core
Integers by 21st Century Lessons: A Boston Teachers Union Initiative
Curriculum/Scope & Sequence, Handout, Presentations
Integers. Integer Operations. This is the fourth lesson from the Number Sense unit. This lesson is designed to help students understand and use positive and negative numbers to represent quantities in real world contexts, explaining the me…

Common CoreCommon Core
Grade 6 Math Lesson Plans: Equations & Expressions  Lesson 05 by 21st Century Lessons: A Boston Teachers Union Initiative
Lesson plan, Curriculum/Scope & Sequence, Handout
Grade 6 Math Lesson Plans: Equations & Expressions  Lesson 05. “Evaluating Expressions.” This lesson is designed to be implemented following the previous lessons in this unit. This lesson demonstrates how to evaluate algebraic express…

Common CoreCommon Core
Grade Six Math Lesson Plan  Intro to Absolute Value by 21st Century Lessons: A Boston Teachers Union Initiative
Lesson plan, Curriculum/Scope & Sequence, Other, Assessments
Grade Six Math Lesson Plan  Intro to Absolute Value. This lesson is designed to introduce students to the concept and usage of absolute value. It is tied to the second part of the common core standard 6.NS.7. Lesson Objective: Students wi…

Common CoreCommon Core
Solving Percent Problems with a Double Number Line by 21st Century Lessons: A Boston Teachers Union Initiative
Lesson plan, Curriculum/Scope & Sequence, Other, Handout
Solving Percent Problems with a Double Number Line. This lesson extends students’ understanding of ratios to include thinking about the relationship of part to whole in a reallife situation and the percent equivalence. Rather than teachin…

Common CoreCommon Core
Area of Triangles by 21st Century Lessons: A Boston Teachers Union Initiative
Lesson plan, Curriculum/Scope & Sequence, Handout, Activity
Area of Triangles. This lesson combines both a constructivist and direct instruction approach in supporting students in developing a solid understanding of area of any triangle. The constructivist portion occurs while students are working

Common CoreCommon Core
World Practice with Rates and Unit Rates by 21st Century Lessons: A Boston Teachers Union Initiative
Lesson plan, Curriculum/Scope & Sequence, Other, Handout
World Practice with Rates and Unit Rates. This lesson will begin with a review of finding unit rate in a realworld situation. Then students will be introduced to finding unit rates using decimals, like Usain Bolt's time. We will then ask …

Common CoreCommon Core
Comparing Numerical Data Using Box Plots by 21st Century Lessons: A Boston Teachers Union Initiative
Lesson plan, Curriculum/Scope & Sequence, Other, Assessments
Comparing Numerical Data Using Box Plots. This is the last installment of a seven lesson unit on statistics. The lesson begins with a review of measures that can be used to analyze sets of data (mean, median, maximum, etc). Following the r…

Common CoreCommon Core
Volume of Right, Rectangular Prisms by 21st Century Lessons: A Boston Teachers Union Initiative
Lesson plan, Curriculum/Scope & Sequence, Other, Handout
Volume of Right, Rectangular Prisms. This lesson was designed to teach volume within the confines of an engaging, relatable scenario. As it is an introduction into the most basic of volume formulae, the lesson is structured to be broadly a…

Common CoreCommon Core
Graphing Polygons and Finding Side Lengths by 21st Century Lessons: A Boston Teachers Union Initiative
Lesson plan, Curriculum/Scope & Sequence, Policy, Assessments
Graphing Polygons and Finding Side Lengths. During this lesson, students will review the characteristics and definitions of polygons, other key vocabulary related to polygons and coordinate planes, and how to graph coordinates (if needed).…