Categories
Multiplication Numbers & Operations in Base 10

Multiplication Algorithm

multiplicationmistake

 

How did this kid come to believe in this algorithm?

Thanks to Amy Burk for the submission.

Categories
Decimals Fractions Numbers & Operations -- Fractions

Plot 0.4 on the Number Line

IMAG0249

 

How did the student make the decision to plot 1/4? Tell a story.

Source: Chris Robinson

Categories
Fractions Numbers & Operations -- Fractions Site Business

Error Patterns in Computation

IMG_2587

This is a snapshot of a book by Robert Ashlock, Error Patterns in Computation.

Penny for your thoughts in the comments. How does a book like that relate to a blog like this?

Also, jump in if you have anything interesting to say about this sort of fractions error.

Categories
Algebra 1 Grade 4 Numbers & Operations -- Fractions

Equivalent Fractions

Same question, but 6 different pieces of student work.

What is a lesson that you can glean from this question and these student responses? Say you’re the teacher of this class. What do you do next? (For full context: the submitted pictures are from a 9th grade Algebra 1 classroom.)

Categories
Fractions Numbers & Operations -- Fractions

“Fractions are really small things.”

Today isn’t a sample of student work, exactly. It’s an interview with a kid.

 

Interview_for_how_students_learn

 

[Source: How Students Learn: Mathematics in the Classroom, p.314]