In this episode, we discuss the meaning of the equal sign, why multiplying by decimals less than one makes numbers smaller, and rounding vs. estimating.

Open Middle Kindergarten Equality Problem

Open Middle First Grade Equality Problem

Open Middle 2 Digit Equality Problem

Open Middle Recording Sheet

Broken Calculator

Broken Calculator in Episode 6

Powers of Ten Video

Decimal Multiplication Number String

Number Strings Website

Blog Post about Inaba Puzzles

In this episode, we discuss Ruth's implementation of the Mini-Me lesson and Tracy's next steps with coaching.

Robert Kaplinksy Episode

Mini-Me Lesson

Decimal Number Project

Number Talk Support Survey

Lesson Study Episode

VDOE Rich Tasks

In this episode, we are joined by Robert Kaplinsky, author of the new book, Open Middle Math, and founder of Grassroots Workshops.

Robert Kaplinsky's Website

Robert Kaplinsky on Twitter

Robert Kaplinsky on Facebook

Open Middle

Depth of Knowledge Matrix

Open Middle Worksheet

Open Middle Book

Robert's Real World Lessons

Mini-Me Lesson

Just in Time Scaffolding

#ObserveMe

Tracy's #ObserveMe Poster

#ObserveMe Troubleshooting

Grassroots Workshops

Ruth's Selfie

In this episode, we discuss flexibility with place value & decimals, the relationship between addition and subtraction, and comparing numbers.

Nothing Stopped Sophie

Unit Form For Decimals

DIY Rekenrek

Ruth & Tracy on Halloween

Steve Wyborney's Math Splats

Berkeley Everett's Math Flips

How Are Addition & Subtraction Related?

Base Ten Blocks: See Number 15

Alligators Are for Swamps

The Eleventh Hour: A Curious Mystery

In this episode, we discuss Ruth's upcoming rounding decimal lesson, Number Talks, and modeling subtraction with regrouping.

Motion Math App - Zoom

WODB with Base 10 Blocks

Number Talks Planning Document from Trish Kepler