PBS Mathline


Grades PreK-2nd, 3rd-5th, 6th-8th, 9th-12th



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Type of Video

Video of classroom mathematics lesson 


Length of Videos

15 - 60 minutes


Number of Videos



Content Domains

  • Grades K-5: Measurement and Data; Operations and Algebraic Thinking; Geometry; Number and Operations in Base Ten; Number and Operations - Fractions;  

  • Grades 6-8: Expressions and Equations; The Number System; Ratios and Proportional Reasoning; Statistics and Probability; Functions; Geometry 

  • Grades 9-12: Algebra; Functions; Statistics and Probability; Number and Quantity; Modeling


Description of the Videos

  • A number of the lessons follow a launch-explore-summarize format.  The teacher first introduces or sets-up a class task, activity, or experiment. Then the teacher provides students time to engage in the mathematical task/activity/experiment. The teacher then concludes with a discussion or lecture about the overarching mathematical idea(s) in the lesson.  

  • Many of the lessons in the videos include both small group and whole class discussions in which students are working on a mathematical task, activity, or experiment that requires a significant portion of the lesson’s time.   

  • Some of the teachers in the videos demonstrate instructional practices and mathematical tasks that have the form but not the function of those advocated by the NCTM Standards.

  • The videos include teacher and student reflections on teaching and learning; teacher voice over and interpretation of some of the events in the classroom videos; edited, full lengths segments of the classroom lesson; segments of video focusing on individual and groups of students engaging in mathematical tasks


Names of the videos by grade band 

  1. Grade PreK-2: Button, Button; Creature Features; Here, There, and Everywhere; It’s a Perfect Fit - Part I-III; Money Counts; Peddling Petals; Sand Babies; Tessellations WOW!; The Magic Box; To Half of Half Not

  2. Grade 3 - 5: An Apple a Day; Bead-Dazzling; Blazing the Trail; Bubble Mania; Chances Are - Part I - III; Food for Thought; It Takes Ten; Looking Through the Algebraic Lens; Mirror, Mirror; Mix It Up; SideWalk Capers; Snake Patterns-s-s-s; Soak It Up; Struts n’ Stuff; Tree-mendous Plots; Whirlybirds

  3. Grade 6-8:  Alphabits; Aw Chute; Drip, Drop, Drip, Drop; Fantasy Baseball - Part I-II; Fill ‘er Up; Hop to It; How Many Noses are in Your Arm?; In a Heartbeat; Is it Really News?; Let’s Face It; Looking Through the Algebraic Lens; Million Dollar Giveaway; Once in a Blue Moon; Reaching New Heights; Remove One; Rock Around the Clock; Roll Out the Barrel; Rumors; Something Fishy; Steppin Out; The Factor Game; The Great Race; The Smithville Families; Tiling the Plaza; Up, Up, and Away; We’re All Tuned In Wet Heads; What’s Your Angle?

  4. Grade 9-12: Bottles and Divers; Building Boxes; The Busing Problem; Getting Out of Line; Meadows or Malls; Mystery Liquids; Pennies, Pressure, Temperature, and Light; Rhinos and M&M’s; Squares Inside Squares; Stressed to the Breaking Point; Toothpicks and Transformations; The Yo-Yo Problem; Making the Case


Usefulness of the Videos

  • The videos of the classroom lessons are useful in modeling the set-up and implementation of high-level mathematical tasks as well as the set-up and implementation of procedure without connections tasks.  

  • The videos of the classroom lessons are useful in modeling patterns of discourse advocated in 

  • NCTM Standards (1991, 2014) as well as traditional I-R-E discourse patterns.  

  • The videos of the classroom lessons are useful in modeling instructional practices that vary along the continuum between traditional, direct instruction/transmission practices and problem/student-centered, NCTM (2014) Principles in Action aligned practices.  

  • The teacher reflections are useful in providing insight for the teacher’s instructional decisions and the student reflections are useful in providing insight about the lesson from the learner’s perspective.

  • A number of videos provide segments of video focused on individual or groups of students working on a mathematical task that are useful for representing students’ mathematical thinking and reasoning around the mathematical ideas in the lesson.  


Ancillary Materials

  • Lesson Plans that include lesson objectives; lesson overview; lesson materials; procedure for implementing the lesson; extensions for the lesson

  • Descriptions for teacher educators as to how the lesson aligns with the  Professional Standards for Teaching Mathematics (NCTM, 1991)



PBS Learning Media


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