Tag Archives: 2nd grade

Fun with pentacubes

Today we started a unit on geometry with the second graders.  The first activity had them explore how many different structures can be made out of 4 snap cubes.  They very quickly came up with the five tetrominoes: After a … Continue reading

Posted in Uncategorized | Tagged , , , , , | 4 Comments

A number talk that turned into an investigation

It all started out with 12+12+12 a problem that was not particularly difficult for any of my 1st/2nd grade students.  The students took turns suggesting strategies for doing this computation and I recorded them on the board (this was an … Continue reading

Posted in Uncategorized | Tagged , , , , , | 7 Comments

Logical Fun, Part II

Here is the long overdue follow-up post to Logical Fun, Part I. The previous post left off with the following logic problem being posed to the students: A man is looking at a portrait.  A passerby asks him whose picture … Continue reading

Posted in Uncategorized | Tagged , , , , , , , | 1 Comment

Logical Fun, Part I

Once a week, I teach a joint math class at my school which combines children of ages 6-10.  For these lessons, I generally try to pick an activity that I can present as a series of “problems” of increasing difficulty … Continue reading

Posted in Uncategorized | Tagged , , , , , , , | 2 Comments

Fibonacci Trees

For two weeks in a row, in our joint 1st-5th grade math classes, a certain famous sequence made its appearance.  The activities were seemingly very different: in the first one we were climbing stairs one or two steps at a … Continue reading

Posted in Uncategorized | Tagged , , , , , , | 1 Comment

Four colors or more?

When you find your students working during break time on a problem that was the topic of a lesson three weeks prior, you know that something has gone right and your heart is filled with joy and excitement. What they … Continue reading

Posted in Uncategorized | Tagged , , , , , , , | 4 Comments

Great Mathematicians, Old and Young

Almost every week, I read or tell my second grade class a story about a famous mathematician.  Recently, we have been reading from the book Mathematicians Are People Too: Stories from the Lives of Great Mathematicians and the students have been … Continue reading

Posted in Uncategorized | Tagged , , , , , , | 1 Comment