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Rating | Views Title Posted Date Contributor Common Core Standards Grade Levels Resource Type

AN algorithm for subtraction


A 2nd grade student shared an algorithm for subtraction that was learned at home. This provides a great opportunity to make sense of mathematics! With a focus on place value, the algorithm can be made sense of by our students.  The PDF Pencast simply explains the algorithm...share it in class and use it as a context to make sense of math, develop number sense, focus on place value. NOTE: Adobe Reader DC (or equivalent) is needed to view the "video" aspect of this pencast PDF.

3/13/2017 Scott Adamson
2.NBT.A.1 2.NBT.A.1a 2.NBT.A.1b 2.NBT.A.4 2.NBT.B.5 2.NBT.B.7 2.NBT.B.9 MP.1 MP.2 MP.3 MP.6 MP.7 1 2 3 Video

Histograms vs. Bar Graphs


Using data from the Internet, students summarize information about party affiliation and ages at inauguration of Presidents of the United States in frequency tables and graphs.  This leads to a discussion about categorical data (party affiliations) vs. numerical data (inauguration ages) and histograms vs bar graphs. This activity is from NCTM Illuminations at

6/2/2015 Trey Cox
3.MD.B.3 MP.3 MP.4 3 Activity

What does division mean and how do you do it?


This activity focuses on the idea of divsion and challenges students to make sense of what division means and helps students to make sense of the traditional algorithm of "long division."

10/1/2014 Scott Adamson
3.OA.A.2 3.OA.A.3 3.OA.A.4 3.OA.B.5 3.OA.B.6 3.OA.C.7 MP.1 MP.2 MP.3 MP.4 MP.7 MP.8 3 Activity

Number Systems - Place Value


Exploring different number bases may not only help you if you are needing in some particular application (like computers or electronics), but also in helping you make sense of the number system with which you are most familiar – the base 10 number system.

9/6/2014 Trey Cox
5.NBT.A.1 5.NBT.A.2 5.NBT.A.3 5.NBT.A.4 3.NBT.A.1 3.NBT.A.2 4.NBT.A.1 4.NBT.A.2 4.NBT.A.3 MP.1 MP.2 MP.3 MP.4 MP.5 MP.6 3 4 5 6 7 8 Activity

Inside Mathematics Educator Resource Site

Inside Mathematics is a professional resource for educators passionate about improving students' mathematics learning and performance. This site features classroom examples of innovative teaching methods and insights into student learning, tools for mathematics instruction that teachers can use immediately, and video tours of the ideas and materials on the site.

6/13/2014 Phillip Clark
MP.1 MP.2 MP.3 MP.4 MP.5 MP.6 MP.7 MP.8
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