EDCI352 Math Content - Multiplication
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EDCI352 Math Content - Multiplication

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Multiplying Decimals

Andrew Bronstein's insight:

I like the Khan Academy videos because they provide a visual along with the audio lesson.  This helps students who are more visual learners, as well as the fact that it gives students something to visually focus on and therefore keeps their attention. I love the fact that they thoroughly explain the rule of moving the decimal point in the product the total number of places it has been moved in the two factors combined. I am skeptical about their choice of using 0.5 as the second factor.  I question it because of the 0 in the ones place. Since my students have been focusing on (and struggling with) two digit multiplication, This would prompt the question from my students, and I wish the video would at least acknowledge that they have disregarded the 0 because 0 times anything is 0 and when you add 0 to any number, the sum is that same number. I also don't like the selection of 0.5 because of what they say at the end of the video about checking. I see why they chose 0.5 so they could check this, but this would just confuse my students. They have yet to discover that multiplying by 0.5 is the same as dividing by two, or that the answer should be close to half. For this reason, I will stop the video after they get the answer.

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Decimals Worksheets | Free Printable Decimals Worksheets

Decimals worksheets from comparing and ordering decimals to rounding and operations with decimals.
Andrew Bronstein's insight:

This site has a lot of different worksheets that the students can use to practice. There are all different subsets of decimal multiplication problems by number of digits and the place value of those digits. Unfortunately there is no teaching value as far as expository learning. Still, the practice is very useful at this point. By fifth grade, students should have a good enough understanding of multiplication, both single digit and double digit. The students will still need to learn the rule that the number of places the decimal point moves in the answer is equal to the number of total places the decimal point moves in both of the factors of the problem. These worksheets should help them practice that rule. The fact that the website breaks them down by place value helps ease the students into this, and then the various decimal places allows for a summative assessment so they do not just fall into habit. For example, my students have been doing 2 digit tenths times 2 digit tenths, and I now wonder if they are actually understanding the rule or if they have just realized that everything my mentor teacher gives them is going to have an answer using hundredths.

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Five Minute Multiplying Frenzy -- One Chart per Page (Range 1 to 10) (A) Multiplication Worksheet

The Five Minute Multiplying Frenzy -- One Chart per Page (Range 1 to 10) (A) math worksheet from the Multiplication Worksheet page at Math-Drills.com.
Andrew Bronstein's insight:

I gave this to my kids to test their knowledge of their multiplication facts. The problem is when you do this like a typical five minute frenzy, where they have only five minutes to see how much they can complete the sheet, this confuses the students. They often do not see assessments like this and they struggle putting together exactly what they need to do and the best strategy to tackle it. I think this grid could be more useful as a study guide that the students can fill in as they learn their facts. Actually, as I type this, I think that for that purpose, it would be more useful to have that sheet be in numerical order for both the columns and the rows. I think the best use for this would be if it was gone over thoroughly -and not used in a five minute frenzy activity, especially my students.

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Multiplication Table 8 (You Will Go Far!)

A beat with animation for the times table to the number 8.
Andrew Bronstein's insight:

We did not play this in class, but I think the kids would love the beat and would dance along. If I can get my kids to watch video clips like this instead of the junk they normally watch, I would consider that progress. Hopefully they enjoy this to the point where they take the initiative to search for these things. I think if I showed this, given that it only covers the 8s, I could then take them to the computer lab and assign them to find a multiplication song/rap that covers one of the other single digit times tables. There are plenty on the internet, and then we could share and that way the entire class could watch them.

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Multiplication Puzzles:

Multiplication Puzzles
Andrew Bronstein's insight:

I think these puzzles are a fun way for kids to practice their facts. You can edit the message that they solve, and my mentor teacher last year used that to start the class discussion

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Math Antics - Multi-Digit Multiplication Pt 2

Andrew Bronstein's insight:

I love this video because it creates an excellent visual along with the lesson. This video is good to show to the class as they work on the problem. He does go fast though, so when showing it to the class, I as the teacher should pause it as the students work through it. These pauses should come after each step. I would like it if he explained a little more about breaking the problem in to tens and ones and why we add -because we have broken apart-  but I love his explanation of why we put the zero down. The issue with that is that he gets side tracked as far as what would happen if we had a 3, 4 or 5 digit second factor. While the students will need to know this eventually, and it may be a question in the class, I feel that being side tracked distracts students, especially those who struggle. I also think he gets side tracked when he says he likes to pretend. I like to use my imagination too, and the students know it, but I let them know in a way that is productive, like using manipulatives for class, instead of reinacting scenes from Star Wars like this guy did. Still, I think the value of this lesson with the visual aid is astronomical and I have subscribed to the channel on YouTube.

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Multiplication Facts to 144 Including Zeros (A) Multiplication Worksheet

The Multiplication Facts to 144 Including Zeros (A) math worksheet from the Multiplication Worksheet page at Math-Drills.com.
Andrew Bronstein's insight:

We give these to our students every Friday. This is what we use for our Five Minute Frenzy activity. We monitor the students progress with a bulletin board that I created where each student is represented by a school bus with their name on it. They are all on the road to success and they strive to move their bus to 100 percent (both completion and correctness). Every student in the fifth grade does this, but my class is lower. While my highest student is at 80 after 3 weeks of doing this, I still have a few students who are in the teens. The only issue I have with this is that it focuses on the factors of 0-12. This site has all imaginable subsets of multiplication charts except one that covers factors of 0-10. My students get a little hung up on 11 and 12 because it is double digit multiplication. I understand the reasoning that those numbers are quick to add and also that a lot of the multiplication charts, such as those in compostion books, go up to 12, but unfortunately this still trips up some of my students. This causes them to be stuck on them during our Five Minute Frenzy activities.

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Multiplication Table 8 (You Will Go Far!)

A beat with animation for the times table to the number 8.
Andrew Bronstein's insight:

I am honestly a little skeptical about using this in the class. It tends to poke fun at math and school, but it does provide the steps to multiply two digit numbers, which my students are in dire need of. However, I worry if they would be able to differentiate the entertainment aspect of it (which is a little discouraging  to learning) from the educational aspect. I do love that they specify that 56 is 5 tens plus 6 ones as that is what causes my students hiccups, especially when multiplying by the tens digit and remembering to put the zero as the place holder since we are no longer dealing with the ones place.

Andrew Bronstein's comment, December 4, 2013 7:47 PM
Additionally, I don't know if the kids watch Animaniacs any more, but I think if they do, the familiarity with the characters will spark their interest and get them to pay attention. Unfortunately I find that this is an everlasting battle with children of this generation.
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Mrs. D's Multiplication Rap Remix™

The lyrics of this rap were written by "Mrs. D", Sharon Danziger. The "hook" was written by Jeremy Danziger. The rap features the St. Louis rapper, Stevie St...
Andrew Bronstein's insight:

We played this for the kids and they loved it. Most of them were dancing along. The students really love music, and this especially hits home since it is the genre of music that most of them prefer. Unfortunately, it only goes through the 2 and 3 times tables. This could be used to get them to memorize their times tables, and sing along. Additionally, I could challenge them to write verses or lines for the 4 times tables.

Andrew Bronstein's comment, December 3, 2013 3:58 PM
It does mention the rules for multiplying by 0 and 1, but it really focuses on the 2 and 3 times tables.