Learning basic facts through tricks or a mnemonic song lead students down a path of memorization, not understanding. I previously discussed the idea of conceptual development here. When students practice their multiplication facts, they’re expected to move from concrete to abstract too quickly. This takes time!!!

Moving too quickly forces memorization and avoids any possibility of multiplicative thinking. First students are asked to model 3 rows of 6 using colored tiles…

Then after a day or two of exploring arrays, students are magically expected to remember that…

Intensions are good but strategy development is the key underpinning of automaticity. In the past I’ve asked myself the following questions:

*When do students practice multiplication that’s not written as AxB? (for the purpose of automaticity)**When/how is multiplicative reasoning fostered?**When do multiplication strategies become automatized?**When do number strategies become number knowledge?*

My answer to all 4 questions….I use multiplication subitizing cards with my daughter whose in 2nd grade so I figured I’d videotape and share.

My takeaways:

- It’s easy to identify which facts she’s comfortable with and has automatized.
**At 1:15**– she demonstrates how she used multiplicative thinking for 6×6.**At 2:00-**she could use her understanding of the commutative property for multiplication to build fluency. She was quickly is able to recognize that 7×5=35 at*1 minute*, but it took some time to figure out 5×7. She owns this strategy for addition so I’m waiting for it to click with multiplication….no rush:-)**At 2:20**– I missed a fact when she was wrong (doh!)- At
**2:48**and**3:55**she explains her multiplicative reasoning.

5 minutes spent purposefully building fluency and I gained so much information about my daughter. The great thing is that it works for every 8 year old…even the ones in your school.

**Disclaimer:** I didn’t create the cards and don’t know who did but they deserve a virtual math hug! If you know who did please let me know so I can give proper attribution!

Cheers!

Can anyone explain to me why the cards use a different pattern for the smaller pattern of 7 dots inside the circle vs the 7 circles of dots ? To me it does not make sense to have 2 different patterns at micro/macro level.. This is really cool stuff – I will try on my kids (and myself)

Good question Fredrik and to be honest I’ve never really thought about it, but I have noticed it.

I am in the process of creating some similar cards since I am not the one who created these in the first place. I wish I knew who was the creator. I’ll be sure to keep the pattern consistent throughout to help build automaticity. Thanks for pointing that out again.

There are actually a couple of things that was counterintuitive for me:

1. As pointed out – the lack og consistency between micro/macro level

2. Lack of symmetry (I cannot provide a good reason, but it just stroke me as a bigger cognitive leap)

3. using different pattern than dices on e.g 3 . May be less relevant for small kids that have not seen dices before, but I think there will be a reinforcement/recognition factor her.

I dont know much about the theory and behind this, but I sketched up my own basic pattern fixing the two last issues here:

https://drive.google.com/a/newschool.me/file/d/0B8CItqQhTUNlZjhGWjVGVlhyajQ/view?usp=sharing

This guy seems to be an one of the experts http://udenver.academia.edu/DouglasClements

Would be interesting to hear other opinions on this issue.

I’ve used similar cards found here! http://teachmath.openschoolnetwork.ca/wp-content/uploads/grade3/documents/multvisrepcards.pdf

These array cards are also great because of the way the dark lines show up. It helps them see, for example, 8×5 can be thought of as 5×5 + 3×5.

https://777d6de7-a-62cb3a1a-s-sites.googlegroups.com/site/get2mathk5/home/math-toolkit/sequencing-numbers/ff-mutiplication-division/arraymultiplicationflashcards.pdf?attachauth=ANoY7crUHGzXdmRpNaDbUTrlIeIMr18oIagIUgAVwYP7GMmiU5HVtR6EAwddSlXlZ-w7HWZFG-hNbO9zZJh2pLqsguaDWCwpvKsvtkRbzCG6PXph13pDMSQ-wgq1D5OeABNVMrjy5hhdkgsA6kevOlEdTN_MRZUAOw2l3IudR9BdsgE0Ii30bZjT8H7o-p7NxNOlgBkzq4Woy0QMjdCXrUKnXZERs-bhX0RDK9pjkKAb3OncB3C1M4-7pk0PUuO_6jwJSivkx-TyIyyYKWaLPb-HON0tYIjawKV8_Is40fxJJEJsmKwv0dP4aSkzBchrJqaBhJKDVyEzQfzwdf54Xv9iAPkuz6OSmQ%3D%3D&attredirects=1

Thanks for sharing the cards Ashley. They’re a nice little addition!

Love this! I plan to try them with my 5th graders who are struggling with math fact memorization. The picture in the middle of the page says 3 X 6 = 30. What am I missing? Is that supposed to be a mistake or…

I tried using the cards with a fifth grader last week, hoping that they would help her develop her multiplication fluency. Well, what I discovered was that she had a hard time subitizing even 1 group of numbers, let alone multiple groups in the circles. She had to keep counting them on each card.

When asked, she said she had never used such cards, so I took this to mean she had never been exposed to subitizing with addition or subtraction. It really never occurred to me that she wouldn’t recognize 7 dots. So next week, we will be working on just the lower numbers and then build up from there. This is a great reminder to me to continually search for gaps in understanding. Thanks so much for these cards!

It’s amazing what gaps we find in student thinking when we start digging! Nice work Marian and thanks for sharing!

Can’t wait to use these cards with my students working on developing multiplicative thinking! Thanks Graham!

Love that you’re always seeking ways to engage your students Andrew. Self-contained isn’t the easiest of teaching positions but definitely one of the most rewarding! Can’t wait to hear how it goes when you give them a try. I’ll be looking for a post over at https://thelearningkaleidoscope.wordpress.com/

Cheers!

Subitizing activities are an integral part of the development of all facets of number sense. Some kids do not develop this mental capacity as automatically as some others and these activities are such a wonderful method to get those kids caught up, or in your case to begin the process of developing multiplicative reasoning. Thanks for sharing.

Absolutely!!! I think as teachers we all get the “big ideas” but it’s identifying the ways to bridge the learning in-between that we sometimes find difficult!

Hopefully this piece of the puzzle will help pick up a couple more students.

Thanks for checking in Steven and for the comment.