## Reflection: Intervention and Extension Mental Math and Multiplication with Tens - Section 2: Concept development

Students who are struggling with place value, struggled today.  It wasn't a lot of kids, but nevertheless, it was frustrating for me.  I know I will need to back fill those students holes and give them more opportunities to build numbers and solidify their place value knowledge.  The few students who struggled had challenges computing 80 x 40.  They could figure out the pattern and re-write the number sentence as 8 x 10 x 4 x 10, and then 40 x 100.  This is where they got stuck. They had a difficult time figuring out what 40 x 100 is.  This is place value skill.  These students struggle with naming numbers and knowing that forty hundreds is the same as four thousands.  I was struck with feeling overwhelmed today as well as feeling content. The large majority of my students do get this concept which leaves me feeling content. The few that don't understand this concept, along with other concepts leave me feeling somewhat overwhelmed.  I am thankful that I have a schedule set up in which I can pull students at a designated time to re-teach and give more support, but there are days when I wish I could stop time for a bit and get the stragglers caught up.

As seen in my video reflection, the biggest dilemma in this lesson was that students didn't know how to fill out the number puzzle.  They understood and knew how to multiply, but then had trouble figuring out how to put their products in the squares.  I did not anticipate this being a problem at all, thus was somewhat frustrated when I was working with a small group of students being interrupted multiple times.

Most of the students understood the concept of multiplication using the area model, rewriting the number sentence using the associative property, and then using mental math to calculate the product.

Place value frustration returns
Intervention and Extension: Place value frustration returns

# Mental Math and Multiplication with Tens

Unit 2: Multiplication with Whole Numbers
Lesson 4 of 22

## Big Idea: Students will find numeric patterns in multiplication with ones and tens and solve multiplication problems mentally by factoring tens.

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60 minutes

### Melissa Romano

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