Bridges Blog Archive for Computation

Mastering the Skills of Estimation

Children need lots of practice, with various activities in different settings, to develop a strong sense of number. I like to introduce a fun activity, Estimation Bag. I place a small plastic container inside a canvas bag, and a student adds a single type of object: paperclips, pennies, barrettes, etc. We start with 10 or fewer and increase the quantity to between 10 and 20 after a month or so.


Exciting Misconceptions

Are you wondering how in the world a student’s misconception could stir enthusiasm in their teacher?


Anchor Chart Assessment

Teacher Question: I’m not sure whether my students really understand the models and strategies that we’ve been talking about this year. Do you have any ideas about how we might assess them?


Fluency: Accurate, Efficient & FLEXIBLE Thinking

As a math coach, few things excite me more than seeing children develop mathematical fluency: efficient, accurate, and flexible ways of learning.


Ratio Tables Help Students to Think Mathematically

Jeffrey's Frykholm's book, Learning to Think Mathematically With the Ratio Table, inspires educators to consider ways to use ratio tables to promote student understanding.  The book's overview notes:



Learning with the New Number Line App

Recently, The Math Learning Center released its fourth free app, Number Line. Using the Number Line, students explore strategies based on place value and properties of operations, and compute distances or differences between two numbers with addition and subtraction.


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