basic math

Get a free 30-day trial of our Online Game

Posted on by Dr. Don
Here’s information (that may not be apparent) about the next step–after registering for a free account for the Rocket Math Online Game.  The next step is to to try out the game with some students by signing up for our No risk 30 day trial. 

Your credit card will not be charged until the end of your 30 day trial, so if you cancel before then you do not pay a thing. You can order from the “My Profile” page of your account with a credit card to order subscriptions. It looks like this picture. 

No gotcha here–See how the auto-renew is turned off by default?  

Leave the renewal period set to monthly, and leave auto renew set to OFF in your profile.

Your subscription will simply end after 30 days.

No matter how many subscriptions you order, your credit card won’t be charged until you login and renew.  So you can try the game for free to see if it’s worth paying for with no risk of being charged for it.

Non-credit card options

If you wish to buy subscriptions by sending in a Purchase Order here’s a link to our order form. Or, if you wish to order online with either PayPal or a PO number click this link to get to that page. 

Either in PayPal or with a PO we will give you 13 months, and if you tell us you don’t want it during the first month, we’ll cancel your subscription and cancel the invoice. With PayPal we’ll give you a full refund if you don’t want to keep it.    

If you ask, I can also manually give you a 30 day free trial–without you having to enter a payment method.  Then we can send an invoice if you wish to continue.  Just contact don@rocketmath.com, with the number of subscriptions you would like to use during your free trial. 

Students work with together to learn how to write their numbers.

Fact Families (+ & -) for 1st and 2nd grade

Posted on by Dr. Don

Learn Fact Families to fluency with Rocket Math!

Fact Families Part Two  11 to 18 (add & subtract).  A fact family includes both addition and subtraction facts. This program is Part 2 of Fact Families, coming after Fact Families 1 to 10. You can see to the left the 18 examples of fact families taught in this program starting with Set A; 11-2, 11-9, 9+2, & 2+9.  The sheet shows the sequence of learning facts in the new Rocket Math  program Fact Families Part Two 11 to 18 (+, -).  Each set that students learn from A to R adds just one fact family to be learned, so it isn’t too hard to remember.  (That’s the Rocket Math secret ingredient!) 

Learning math facts in families, is gaining in popularity these days.  Logic suggests that this would be an easier way to learn.  However, the research is not definitive that this is easier or a faster way to learn facts than separating the operations and learning all addition facts first and then learning all subtraction facts.  But learning in fact families is a viable option, and I wanted to have it available for Rocket Math customers.

Part Two is a Best fit for second grade.  These facts come after the facts in 1 to 10, typically learned in first grade, so these are best for second grade.  The 25 fact families in 1s through 10s facts are just enough for one Rocket Math program.  It is a good and sufficient accomplishment for first grade.  With the 11 to 18 in Par Two for second grade there will be a lot of review.  In fact sets S through Z are all review. I have heard that some first grades prefer to keep the numbers small but to learn both addition and subtraction–so this program accomplishes that.

I added Fact Families Part Two 11 to 18 (+, -) to the Universal subscription in August of 2018 bringing the total number of programs in the Universal subscription to 19 (the basic four operations and 15 more!).  As always, new programs are added to the Universal subscription without additional cost as soon as they are available.

I most sincerely want students to be successful and to enjoy (as much as possible) the necessary chore of learning math facts to automaticity. Please give me feedback when you use this new program, Fact Families 11 to 18 (+, -),  as to how it goes for the students.

Intervention Tip: Have students practice test

Posted on by Dr. Don

Sometimes students need to review test problems also.

You know that there is a difference between the test problems and the practice problems, right?  The problems practiced around the outside are the recently introduced facts.  The problems inside the test box are an even mix of all the problems taught so far.  Sometimes students have forgotten some of the older facts.  For example, if there has been a break for a week or more, or if the student has been stuck for a couple of weeks, the student may have forgotten some of the facts from earlier and may need a review of the test problems.

How you could diagnose for this problem.  Have the student practice orally on the test problems inside the box with you.  If the student hesitates on several of the problems that aren’t on the outside practice, then the student needs to review the test items.

Solution. If you have this problem with quite a few students (for example after summer break or after Christmas break) then have the whole class do this solution.  For the next week, after practicing around the outside, instead of taking the 1 minute test in writing, have students practice the test problems orally with each other.  Use the same procedures as during the practice—two or three minutes with answer keys for the test, saying the problem and the answer aloud, correction procedures for hesitations, correct by saying the problem and answer three times, then going back—then switch roles.   Do this for a week and then give the one-minute test.   Just about everyone should pass at that point.

Solution.  If you have this problem with a handful of students, find a time during the day for them to practice the test problems orally in pairs.  If the practice occurs before doing Rocket Math so much the better, but it will work if done after as well.  They should keep doing this until they pass a couple of levels within six days.

If neither the first or the second solutions seem to work, write to me again and I’ll give you some more ideas.

Dr. Don from Rocket Math watches the first Rocket Math app user complete math facts test

Four star rating for Rocket Math Apps

Posted on by Dr. Don

Rocket Math App received 4 Stars!

App Names: Rocket Math Add at Home, Add at School, Multiply at Home, and Multiply at School

Developer’s name: Rocket Math, LLC

App Link :

https://itunes.apple.com/us/app/rocket-math-multiply-at-home/id1048024368?mt=8

Primary School Apps (5-7 Years)

Educational App Store Review

Rocket Math is an offshoot of an existing programme for schools designed to increase children’s speed and fluency in answering simple arithmetic. This app encourages frequent short sessions and is supported by plenty of information explaining its purpose and methods.

The purpose of Rocket Math is to build what its developer terms “automaticity” in arithmetic. A fluent reader does not need to decode simple and frequently encountered words letter by letter. The same can be true for frequently encountered arithmetic.

When automaticity is achieved in arithmetic the answers are available in an instant. The advantages of this, beyond speed, are that it leaves more of the person’s mental processes available for other aspects of the problem. If a person does not have to think about achieving simple arithmetic answers, he or she can concentrate on the more complex and lengthier aspects of a problem.

Rocket Math the app follows on from a well-established programme of the same name based on traditional written resources. Repeat practice and a steady increase in the breadth of the covered arithmetic are at the heart of its methods.

Children are taken through a series of stages in which they are faced with a rapid succession of arithmetic questions. Remember, the purpose of this app is to build fluency in frequently encountered arithmetic problems, not complex ones. As such, the questions will be simple ones and, at first, until the breadth expands, there will be little variation in them. Only three seconds is allowed per question so, for some children, developing enough fluency to progress will be difficult but others will thrive on the challenge.

Answers are given by typing them onto a built-in number pad. The app is simple to use and looks attractive. Its space-travel styling and theme add a game-like feel although it is not a game. Speech provides a response to incorrect answers and provides encouragement between levels. It all works very well and provides the exact type of practice that it promises.

An unusual but useful feature is that the app enforces its little-and-often recommendations by insisting on a thirty-minute break after 5 minutes of play. As multiple sessions are likely to yield better results than a single, marathon session, this is an excellent feature that will prevent children from relying on a last-minute catch-up rather than a steady engagement with the app. This, combined with a useful breakdown of each child’s performance in the student report screen, provides reassurance to adults that their children are making the best possible use of the app.

A family of apps is available and potential buyers should think about which they need. Two of the apps cover addition and subtraction and two cover multiplication and division. Your choice here is obviously dependent on what aspect you would like to cover.

The remaining choice is between a school and a home version. They are identical in functionality except that the home version is free to download with a lengthy trial period. The school version has a flat, one-off, fee. Prospective teachers would still be wise to download the home version first so that they can appraise the app’s suitability.

If they choose to utilise the app within their school then buying the school version will be a simpler process than the in-app purchase of the home version. It will also allow schools to utilise the volume purchasing programme whereby they can receive a discount for buying twenty or more of the same app.

Parents will be pleased to see that the app caters for up to three children. As each child engages with the app, parents can check to see how they are performing and offer help, encouragement or rewards as they see fit.   Some useful background information on the app’s purposes and usage are provided within the app itself and a more comprehensive overview of the Rocket Math ethos is available on the developer’s website.

All of the Rocket Math apps provide a learning opportunity that is tightly focused on realising their goal of improving children’s arithmetic fluency. As such, if this is a goal that you also share, you will find them good value and useful apps.

Foolproof method for finding factors

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Knowing when you’ve found ALL the factors is the hard part.

Students have to learn how to find the factors of a number because several tasks in working with fractions require students to find the factors of numbers. Thinking of some of the factors of a number is not hard. What is hard is knowing when you have thought of ALL the factors. Here is a foolproof, systematic method I recommend: starting from 1 and working your way up the numbers. This is what student practice in the Rocket Math Factors program.

https://youtu.be/fDYMRfxtGIc

I have a white board type video lesson that explains this in 6 minutes. https://youtu.be/fDYMRfxtGIc

Bookmark this link so you can show it to your students.

How to find all the factors of numbers
Always begin with 1 and the number itself-those are the first two factors. You write 1 x the number.  Then go on to 2. Write that under the 1. If the number you are finding factors for is an even number then 2 will be a factor. Think to yourself “2 times what equals the number we are factoring?” The answer will be the other factor.
However, if the number you are finding factors for is an odd number, then 2 will not be a factor and so you cross it out and go on to 3. Think to yourself “3 times what equals the number we are factoring?” There’s no easy rule for 3s like there is for 2s. But if you know the multiplication facts you will know if there is something. Then you go on to four—and so on.

The numbers on the left start at 1 and go up in value.  The numbers on the right go down in value.  You know you are done when you come to a number on the left that you already have on the right.  Let’s try an example.

Factors Answers d

Let’s find the factors of 18.  (To the left you see a part of a page from the Rocket Math factoring program.)
We start with the first two factors, 1 and 18. We know that one times any number equals itself. We write those down.
Next we go to 2. 18 is an even number, so we know that 2 is a factor. We say to ourselves, “2 times what number equals 18?” The answer is 9. Two times 9 is 18, so 2 and 9 are factors of 18.
Next we go to 3. We say to ourselves, “3 times what number equals 18?” The answer is 6. Three times 6 is 18, so 3 and 6 are factors of 18.
Next we go to 4. We say to ourselves, “4 times what number equals 18?” There isn’t a number. We know that 4 times 4 is 16 and 4 times 5 is 20, so we have skipped over 18. We cross out the 4 because it is not a factor of 18.
Next we go to 5. We might say to ourselves, “5 times what number equals 18?” But we know that 5 is not a factor of 18 because 18 does not end in 5 or 0 and only numbers that end in 5 and 0 have 5 as a factor. So we cross out the five.
We would next go to 6, but we don’t have to. If we look up here on the right side we see that 6 is already identified as a factor. So we have identified all the factors there are for 18. Any more factors that are higher we have already found. So we are done.

Now let’s do another number.  Let’s find the factors of 48. 

We start with the first two factors, 1 and 48.  We know that one times any number equals itself.

Next we go to 2.  48 is an even number, so we know that 2 is a factor.  We say to ourselves, “2 times what number equals 48?”  We might have to divide 2 into 48 to find the answer is 24.  But yes 2 and 24 are factors of 48.

Next we go to 3.  We say to ourselves, “3 times what number equals 48?”   The answer is 16.  We might have to divide 3 into 48 to find the answer is 16.  But yes 3 and 16 are factors of 48.

Next we go to 4.  We say to ourselves, “4 times what number equals 48?”  If we know our 12s facts we know that 4 times 12 is 48.  So 4 and 12 are factors of 48.

Next we go to 5.  We might say to ourselves, “5 times what number equals 48?”   But we know that 5 is not a factor of 48 because 48 does not end in 5 or 0 and only numbers that end in 5 and 0 have 5 as a factor. So we cross out the five.

Next we go to 6. We say to ourselves, “6 times what number equals 48?”  If we know our multiplication facts we know that 6 times 8 is 48.  So 6 and 8 are factors of 48.

Next we go to 7.   We say to ourselves, “7 times what number equals 48?”   There isn’t a number.  We know that 7 times 6 is 42 and 7 times 7 is 49, so we have skipped over 48.  We cross out the 7 because it is not a factor of 48.

We would next go to 8, but we don’t have to.  If we look up here on the right side we see that 8 is already identified as a factor.  So we have identified all the factors there are for 48.  Any more factors that are higher we have already found.  So we are done.

Why should you renew your Rocket Math subscription?

Posted on by Dr. Don

Reason #1 to renew.

So I can be here for you.  Your subscription enables me (Dr. Don) to be available to work full-time on Rocket Math.  I can be here to answer your questions, help you with your implementation, provide customer service and to continue to expand our offerings.  Every day I correspond with and often get to talk with customers who have questions and need help. In the past year, I’ve added programs such as Add to 20, Subtract from 20, Fact Families, Skip Counting and others to the Universal Subscription. (Check out the list on this link.) I am quite excited about the three new programs (Learning Addition Computation, Learning Subtraction Computation, and Learning Multiplication Computation) that I’ve recently added to the Universal subscription.  (Check ’em out using the links.) Additionally, I have added tools such as the classroom wide aimlines in Excel to keep track of the progress of your whole class.  Most exciting of all, I have a team developing a browser-based Rocket Math game that students will be able to use at home and at school with one log-in. Your subscriptions make all of that possible.  Thank you.

Reason #2 to renew. 

You get permission to copy.  The second reason to renew is that the subscription gives you “permission to copy” the materials for a limited time.  After the subscription expires, permission to copy the materials also expires (it is no longer granted).  As you can see, the footers on our materials now show your name and the expiration date.  In order to continue printing and copying the Rocket Math worksheets, I ask that you please renew your subscription.

Reason #3 to renew.

You can access our filing cabinet.  The third reason to renew is so that you continue to have access to the Rocket Math filing cabinet on the web.  New and updated materials are constantly being added to the filing cabinet. The materials now number in the thousands of pages!
 You can much more easily print from the website filing cabinet, than you can from a paper master copy.  You can print from home and even print from your phone.  When anyone finds an error in one of the thousands of worksheets, I can change it the same day in this virtual filing cabinet.  When anyone asks for a new form I can share it with everyone instantly.

“Knowing” means never having to figure it out

Posted on by Dr. Don

Most people, for example, know their name, by memory.

In a previous blog I discussed  What does CCSS mean by “know from memory?”    

A reader asked the following question:

This topic of “know from memory” is something I have been digging into as a special educator. I wonder what your thoughts are about whether certain accommodations from these “know from memory” standards would actually be modifying the curriculum?

For example, if we used “extra time to respond” and the student had to use their fingers or some other method to count, would they then not be doing the standard?

This relates to where I’m at in middle school math, but I think that it’s reflected in the continuum of the common core maths.

Thanks.

Dr. Don’s response: 

Actually, your example is very clear that it is not “knowing from memory.” You are describing “deriving from a strategy” or what I call, “figuring it out.” When you know it from memory, when you recall the answer, then you stop having to “figure it out.”

Knowing from memory and figuring something out are two very different things. I used to ask workshop participants to imagine sitting next to me in a bar and asking me for my name. What if, instead of saying, “Hi, my name is Don,” something different happened?  What if, like the man pictured above, I was puzzled and said, “Wait a second, I have it here on my driver’s license.” Most people would likely turn their attention elsewhere while wondering what kind of traumatic brain injury I had sustained! They would very likely say to themselves, “OMG, that man doesn’t know his own name.”

The purpose of the verbal rehearsal that is a daily part of Rocket Math is to cement these basic facts in memory. Then when a student says to themselves, “8 times 7 is,” the answer pops into their mind with no effort. It takes quite a bit of practice to achieve that. However, the ability to instantly recall the answers to basic math facts makes doing mathematical computation a relative breeze. It make seeing relationships among numbers very obvious. It makes reducing fractions and finding common denominators easy. That’s why the Common Core thinks “knowing from memory” is so worthwhile. It’s why I began promoting Rocket Math in the first place.

Do you know the active ingredient in Rocket Math?

Posted on by Dr. Don

Timed tests are not the important part of Rocket Math.

The “active ingredient” in the Rocket Math prescription, the thing that makes it work, is not timed tests.  Timed tests don’t actually teach and often don’t really help students develop fluency.  The usual timed tests of a random selection of all the facts can assess fluency in math–but they don’t work to develop it!

The “active ingredient,” the thing that makes Rocket Math effective, is verbal rehearsal.  When students practice with their partner the students read the facts and RECALL the answers from memory and say them aloud.  That verbal rehearsal is what cements them into memory.  Reading the fact and recalling the answer from memory strengthens the neural connection.

Why do we give the daily tests in Rocket Math?  Not to teach, but only to assess whether the facts introduced thus far have been learned well enough for the student to have new facts added to what they are learning.  Individual students learn at different rates.  Some students need only a couple of days of practice to memorize two new facts while others may need several days.  The purpose of the daily tests is just to see if the student needs more practice time, or is ready to “swallow” some more facts.

As I note in my basic training presentation, “It’s like feeding mush to a baby.  You have to make sure they have swallowed the last mouthful before you give them more.”   See an explanation in this You Tube video in our Rocket Math channel: https://youtu.be/J8cWSDG0Di8

two students practicing rocket math facts with a quote "8 times 7 is 56"

Keeping track of progress in Rocket Math

Posted on by Dr. Don

Which students are progressing as fast as they should be in Rocket Math?

And how fast should they be progressing, anyway?

Over the years of helping teachers and schools implement Rocket Math I have learned that a complete laissez-faire attitude about student progress can mean that some students get stuck for weeks on the same sheet.  Needless to say, students who get stuck, come to hate Rocket Math.  When this happens, those students don’t get through all the operations they should learn.  So we need to intervene, and give them more help.  It turns out that some students need more practice, sometimes two or three times more practice, to learn the facts than their peers.  To get such students through one operation a year means they have to have extra practice sessions scheduled in each day.  Here’s a link to a blog about how to provide extra help.

But which students need extra practice sessions?   Under Resources/Educator Resources I’ve created two versions of a tool that can help.

Whole Class Excel Rocket Math (2 operations in a year) Aimline.  This is pictured to the right.  It is needed for 2nd grade and 4th grade and up when students need to finish one operation and do a second one in a year.  The expectations needed to pass two operations in one year are basically that students should pass two sets each week.  If they have studied some the year before, they will be able to pass sets in the first operation at a quick pace.  For example if they have done much of Rocket Math Addition in first grade, in second grade they should be able to pass those addition sets again in a day or two.  That will put them ahead of the expectations and they should have a plus by their name most of the year.  Conversely, if they are not able to pass sets quickly, (see the students highlighted in yellow) they will get a minus by their name and should start getting extra sessions scheduled daily.

How does the Excel Aimline work?

Please note: The pictured EXAMPLE Rocket Math Excel Aimline is available from the link or in the Resources/Educator Resources page for you to download. 

Take the blank template and save it for next year.  Then fill out one for this year.  Look at a calendar and on row 4 enter the month and on row 5 enter the starting day of each week in the school year.  so each column numbered 1 through 36 will correspond to a week in your school year.  In row 7 you see the green expected set to be passed by the end of that week.  At the end of week 1 we expect that students will have at least passed Set A.   By the end of week 2 they should have passed Set C to be on pace to finish two operations in a year.

Entering student names.  Starting in row 10 you enter the student names in column B.  This class only has ten students, but I’m guessing yours probably has more!   Cool thing about excel is you only have to enter those names once.  And if you’re really good you can freeze that column so you can easily see it later in the year.

Entering weekly information.  Each week grab all the student folders and for each student enter the highest set they have passed.  You can see that from the Rocket Chart on the outside of the folder, so you don’t even have to open the folders.  If the letter they have passed is equal or higher than the green set expected at the top of the column for that week, then put a plus by the letter they have passed.

Look at Alvin Ailey at the top of my class list.  Week 1 he had passed both Set A and B, so I wrote “B” in his square.  I put a plus because it is exceeds the expected level for the first week.  By the second week he had also passed Sets C and D.  Only up to “C” is expected,  so I wrote “D” and also gave him a plus.  Alvin is rocking it!

Look at Cindy Crawford a little further down the class list.  Week 1 she had passed Set A, so I wrote an “A” in her she got a plus because she met the expectation.  But by week 2 she had only passed Set B, when C is expected to be passed, so I wrote “B” in her square, with a minus indicating she is below expectation.  Now I highlighted her square yellow, but that’s kind of advanced so you don’t really have to do that.  Only Excel experts can do that, although it really makes it easy to pick out who needs help.  We can see that Cindy continues to make slow progress and continues to get minuses.  She needs to have extra practice sessions scheduled to finish two operations this year.  That pace is fine for one operation per year, but not two.

Look down at Gary Grummond.  He didn’t pass even Set A by the end of the first week so I wrote “np” in the first square.  He continues to make progress the next few weeks, but not fast enough to complete two operations in a year.

Row 8 Fraction of students meeting expectation.    After entering all the students for the week you can see how you are doing overall in your class.  Make a fraction with the numerator being the number of students who are meeting the expectation over the denominator of the number of students in the class.  You want a high fraction nearer to 1.

If that fraction falls below 70%, meaning more than 30% of your class is not on track, then you should institute a class-wide intervention.  Either add an extra practice session each day, or see if there is room to improve the quality of practice.  See these blogs and posts about how to monitor for the quality of practice.

Whole Class Excel Rocket Math (1 operatipon per year) Aimline.   In grades 1 and 3 where students are expected only to complete one operation in a year, you can use this Excel Aimline.  The expectations needed to pass one operations in a year are basically that students should pass one set each week.   Everything else about how you use the excel form is the same.  Note that if you want students to do two operations in the year (for example both subtraction and multiplication in 3rd grade) then you would use the two operation aimline.