Chemists need stoichiometry to make the scale of chemistry more understandable - Hank is here to explain why and to teach us how to use it.

Watch this video in Spanish on our Crash Course en Español channel: https://youtu.be/dZoMgEhNKKg

Pssst... we made flashcards to help you review the content in this episode! Find them on the free Crash Course App!
Download it here for Apple Devices: https://apple.co/3d4eyZo
Download it here for Android Devices: https://bit.ly/2SrDulJ

Table of Contents
Atomic Mass Units 2:24
Moles 5:12
Molar Mass 5:59
Equation Balancing 8:45
Molar Ratios 11:11

Resources:
http://www.chemistry.oregonsta....te.edu/courses/ch121
http://www.iupac.org/publicati....ons/ci/2004/2601/1_h

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Make and launch paper rockets in this fun STEM activity! Written instructions: https://sbgo.org/paper-rockets

NGSS-aligned lesson plans are available on the Science Buddies website:

3rd-5th grade: https://www.sciencebuddies.org..../teacher-resources/l

6th-8th grade: https://www.sciencebuddies.org..../teacher-resources/l

Science Buddies also hosts a library of instructions for over 1,000 other hands-on science projects, lesson plans, and fun activities for K-12 parents, students, and teachers! Visit us at http://www.sciencebuddies.org to learn more.

#STEM #science #sciencebuddies

*******************************
Connect with Science Buddies:

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CLICK HERE: http://readingteacherchad.blogspot.com/ And Learn How To Teach A Child To Read In Two Weeks!


Most children develop the skill of reading by the age of 7. Others however, may be more efficient and start reading easier passages at the age of around 5 or even younger.

This doesn’t imply though that your child is going to keep the head start that he had at the initial ages once he starts to go to the school. By third grade or so, other children would have caught up and this is exactly why it’s important to work on the reading capability of your child in order to keep him up to the mark.

As a parent or a teacher, there are a number of techniques which can be put to use in order to make a child learn to read. Among such techniques, the synthetic phonics and phonemic awareness skills development technique is considered to be the most effective and efficient.

It is of prime importance to understand that before your child is going to be able to read, he has to learn how the sounds in different words work. It is imperative for them to learn that each word is made out of certain sounds which are commonly known as the phonemes. Recognizing these phonemes and separating them from one another is the very fundamental skill that is to be developed in your child in order to make him learn to read.

There is no argument over the fact that phonemic awareness is a widely used term when it comes to learning to read. However, as a teacher or a parent who is looking forward to teach his child to read, it is indispensable for you to be able to understand that phonics and phonemic awareness does not mean the same.

In order to give you a better idea, it is to be mentioned here that phonemic awareness is a term that is used when the fact that certain sounds in spoken language are supposed to work together in order to make the words is being taken into consideration. However, the term phonics only implies that the relationship between a particular sound and the letter which depicts that sound in a written passage is predictable.

It may be of value for you to know that synthetic phonics and phonemic awareness skills development techniques are considered to be the most effective when it comes to question how to teach a child to read. An appropriate utilization of the aforementioned technique is bound to bring the best and the most efficient results for you.

Comparing Fractions Chartlet

Teaching students fractions can be an exercise in frustration, but it doesn't have to be. The fractions poster illustrates simple fractions in three different ways to make the concept visible. There's even a handy resource guide on the back to help you plan to teach fractions.

This brightly colored poster would look great on the wall of your math classroom. The suggested ages for use are 9 through 13, or grades 4th through 8th, but it could be used with students outside of those parameters, especially with advanced youngsters or older students in special education classes.

Use this chartlet to teach your elementary school aged students how fractions breakdown. Hang it on the wall as a convenient reference guide students can glance at if they need help. With more advanced students, you can use it as a springboard to make even more fraction charts. Assign your students to make their own anchor charts displaying fraction breakdowns using thirds or fifths. With your creative mindset, the possibilities are limitless. No matter their grade level, your students will appreciate being able to see how fractions breakdown. The attractiveness of the poster will also add charm to your classroom and make the environment more welcoming for your students.

Specifications for the teaching fractions math poster:

Dimensions: 17" x 22"
Resource guide on back

K - 12: GRADE 5 - DISSIMILAR FRACTION

This webinar was sponsored by the National Center on Intensive Intervention (NCII) and National Center on Systemic Improvement (NCSI) and presented by Drs. Russell Gersten, Sarah Powell, and Robin Finelli Schumacher. The webinar discusses 1) the importance of fractions instruction and typical challenges faced by students, 2) share recommendations for fractions instruction, and 3) provide considerations for supporting students within secondary or Tier 2 and intensive intervention.

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iLearn provides professionally designed math instruction for all markets, including home, K-12, and college. Our instructional programs combine the best scientifically-designed curriculum with state-of-the art delivery systems. Our specialty is providing easy-to-use, highly effective support, for students who have difficulty learning math. It’s the easiest and fastest way to understand math and master math procedures.

This video is one of over 800 similar lessons from iLearn on math topics ranging from kindergarten through high school math.

• Subscribe to our channel and have access to all of our lessons here on YouTube.
• Share this video with your friends via your favorite social site.

For free access to unlimited online practice and tests, along with free access to these lessons, go to:

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For more information, contact us at: www.ilearn.com
1-877-789-2088 ext. 128 (toll free)

If you prefer to read, rather than watch this video, here’s the transcript:

Title: Writing Fractions from Drawings - Fast And Easy Math Learning Videos

In this lesson you’ll learn to write the fraction that’s shown in a picture.
For example suppose you want to write the fraction shown by the shaded part of this picture. In this case the square is the whole.
And the whole is divided into 4 equal parts.
So 4 is our denominator.
3 of the parts are shaded.
So 3 is our numerator.
The shaded part of the picture shows three-fourths.
Let’s look at another example.
In this case the whole is the triangle.
The triangle has been divided into three parts.
However, the parts are not equal in size, so we can’t write a fraction from this picture. To write a fraction, the figure would have to be divided into equal-size parts.
Let’s look at another example.
In this case the whole is a circle.
Notice that we have two wholes shown.
The wholes are each divided into five equal parts.
So the denominator is 5.
7 of the parts are shaded
So the numerator is 7.
The shaded part of the picture shows seven-fifths.
Let’s look at one last example.
In this case the whole is a rectangle.
Notice that there are 4 wholes shown.
Each whole has been divided into three parts
So the denominator is three.
10 of the parts have been shaded in
So the numerator is 10.
The shaded part of the picture shows ten-thirds. In the remainder of this lesson you’ll write the fraction shown by the shaded part of a picture. Now do the rest on your own.

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iLearn provides professionally designed math instruction for all markets, including home, K-12, and college. Our instructional programs combine the best scientifically-designed curriculum with state-of-the art delivery systems. Our specialty is providing easy-to-use, highly effective support, for students who have difficulty learning math. It’s the easiest and fastest way to understand math and master math procedures.

This video is one of over 800 similar lessons from iLearn on math topics ranging from kindergarten through high school math.

• Subscribe to our channel and have access to all of our lessons here on YouTube.
• Share this video with your friends via your favorite social site.

For free access to unlimited online practice and tests, along with free access to these lessons, go to:

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For more information, contact us at: www.ilearn.com
1-877-789-2088 ext. 128 (toll free)

If you prefer to read, rather than watch this video, here’s the transcript:

Title: Multiplying Fractions and Whole Numbers - Fast And Easy Math Learning Videos

When we multiply whole numbers, we can show the multiplication using an array like the one shown here. This array shows the multiplication, 2 times 3.
The array is two blocks tall and three blocks wide.
We can show multiplication of a fraction times a whole number using the same kind of array.
Let’s change the first factor in this multiplication to a fraction.
Here we have the fraction 3 halves times the whole number 3. To show the fraction 3 halves, we start by dividing each whole unit on this side into halves, like this.
We show 3 halves here.
We show the whole number 3 here.
Now we draw the array.
We have three halves here, another three halves here, and three more halves here.
We can show that using repeated addition like this.
When we do the addition, we get 9 halves. That means that 3 halves times 3 is 9 halves.
Another example. Two times one third.
Here we have 2 blocks tall times one third of a block wide.
This can also be written as repeated addition. This time, we have the fraction one third, two times.
We write that like this.
One third plus one third.
We know this is equal to 2 thirds.
So, 2 times one third is two thirds.
Another example.
Six fifths times 4. We write this as repeated addition like this.
When we add, we get 24 fifths.
So six fifths times 4 is 24 fifths.
You probably noticed a pattern here. When we do the repeated addition in each case, the result of adding the numerators is the same result as multiplying the numerator of the fraction by the whole number.
Here, we added the numerator three, three times, and got 9.
That’s the same as multiplying 3 times 3 which is also nine.
Here, we added the numerator one, two times, and got 2.
That’s the same as multiplying 1 times 2, which is also 2.
Here, we added the numerator 6, four times and got 24.
That’s the same as multiplying 6 times 4, which is also 24.
So, to multiply fractions, we don’t have to do the repeated addition, we can just multiply the numerator times the whole number.
That gives us the numerator of the result.
The denominator stays the same.
Here’s an example. Four times three fifths. We multiply the numerator, which is three, times the whole number four, which gives us a numerator of 12.
And we keep the denominator.
So 4 times 3 fifths is 12 fifths.
Last example. Two fifths times 3. We multiply the numerator, 2, times the whole number 3, which gives us a numerator of 6, and the denominator stays the same.
The result is 6 fifths.
In the remainder of this lesson you’ll multiply whole numbers and fractions like these.

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iLearn provides professionally designed math instruction for all markets, including home, K-12, and college. Our instructional programs combine the best scientifically-designed curriculum with state-of-the art delivery systems. Our specialty is providing easy-to-use, highly effective support, for students who have difficulty learning math. It’s the easiest and fastest way to understand math and master math procedures.

This video is one of over 800 similar lessons from iLearn on math topics ranging from kindergarten through high school math.

• Subscribe to our channel and have access to all of our lessons here on YouTube.
• Share this video with your friends via your favorite social site.

For free access to unlimited online practice and tests, along with free access to these lessons, go to:

http://[a]www.ilearn.com%2Ffractions[/a]

For more information, contact us at: www.ilearn.com
1-877-789-2088 ext. 128 (toll free)

If you prefer to read, rather than watch this video, here’s the transcript:

Title: Improper Fractions as Mixed Numbers With Number Line

In this lesson, you will learn how to rewrite an improper fraction as a mixed number. Let's start with the improper fraction seven-thirds.
How many whole units does seven-thirds make? Two.
And how many parts are left over? One.
Write the left over part as a fraction.
Seven-thirds can be rewritten as two and one-third.
Let's look at a few more examples. We start with the improper fraction fourteen-thirds.
How many whole units does fourteen-thirds make? Four.
And two parts are left over.
Write the left over part as a fraction.
Fourteen-thirds can be rewritten as four and two-thirds.
Let's take a look at one final example. We start with the improper fraction three-halves.
How many whole units does three-halves make? One.
And one part is left over. Remember to write the left over part as a fraction.
Three-halves can be rewritten as one and one-half.

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iLearn provides professionally designed math instruction for all markets, including home, K-12, and college. Our instructional programs combine the best scientifically-designed curriculum with state-of-the art delivery systems. Our specialty is providing easy-to-use, highly effective support, for students who have difficulty learning math. It’s the easiest and fastest way to understand math and master math procedures.

This video is one of over 800 similar lessons from iLearn on math topics ranging from kindergarten through high school math.

• Subscribe to our channel and have access to all of our lessons here on YouTube.
• Share this video with your friends via your favorite social site.

For free access to unlimited online practice and tests, along with free access to these lessons, go to:

http://[a]www.ilearn.com%2Ffractions[/a]

For more information, contact us at: www.ilearn.com
1-877-789-2088 ext. 128 (toll free)

If you prefer to read, rather than watch this video, here’s the transcript:

Title: Rewriting Fractions with Common Denominator: One a Factor of the Other

You already know how to rewrite fractions with a different denominator using the product of the denominators as the common denominator. In this lesson, you’ll learn another method of finding a common denominator that can be used occasionally.
Here’s an example. One-half and three-eighths. In this case, notice that the denominator of the first fraction, 2, is a factor of the second denominator, 8.
Let’s look at what happens when we add these fractions on the number line.
We can add these on the number line for halves by putting them back to back like this.
We see that the end of the combined fractions does not fall on one of the lines for a half.
But now let’s add these on the other number line.
Now, the end of the combined fractions does fall on one of the lines for an eighth.
This means that we can add these fractions using eighths, so eight is a common denominator for these two fractions.
When a common denominator is one of the denominators for one of the fractions, there is no need to rewrite one of the fractions. In this case, we don’t need to rewrite three eighths. We do need to rewrite the other fraction like this.
So this fraction becomes four-eighths.
Another example. Four-thirds and five-sixths. In this example, 3 is a factor of 6, so the common denominator for these fractions is 6. Because the common denominator is 6, we don’t need to rewrite the fraction five-sixths, but we do need to rewrite four-thirds with the common denominator of 6.
So, now we have eight-sixths and five-sixths.
Another example. In this case, the first denominator, 3, is not a factor of the other denominator, 8. This means the common denominator is not one of the denominators of the two fractions. One common denominator is the product of 3 and 8, or 24. In this case, both fractions would need to be rewritten with a common denominator of 24.
This gives us eight twenty-fourths and 18 twenty-fourths.
Last example. Five-fourths and nine-sixteenths. Here, four is a factor of 16, so the common denominator is 16. That means nine-sixteenths is not rewritten, but five-fourths must be rewritten as an equivalent fraction with a denominator of 16.

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https://youtu.be/GqbABpNPI_Q

En introduktion til division, Hvordan dividere man.

Gratis matematik opgaver til video'en:
http://matematikerlet.dk/opgav....er/division/Introduk
Facitliste til video'en:
http://matematikerlet.dk/opgav....er/division/Introduk


#matematikerlet
#hjælptilmatematik
#gratismatematikopgaver
#dividere

I dette klippet viser jeg hvordan man regner den vanlige delingsalgoritmen vi lærer i skolen. Jeg fokuserer på fire enkle steg ("dele, gange, minus, flytt ned"), for å gjøre dette mye enklere å huske.

Tak fordi i så med :D husk at smide et like

Lavet med Explain Everything

I denne video forklares en regnemetode til division.

http://www.gym-online.dk

I denne lektion gives en grundlæggende introduktion til brøkregneregler. Vi skal se, hvorledes man dividerer en brøk med et tal.

Original titel: "Dividing a whole number by a decimal"

https://www.khanacademy.org/ma....th/cc-fifth-grade-ma

Eksempel på at dividere et trecifret, helt tal med et decimaltal.

Matematik er bare så let, hvis mestring af Mange får forrang for mestring af matematik. Et barn har allerede sin egne Mange-mestring som 3årig ”Hvor gammel bliver du næste gang?”. Svaret kommer straks med 4 fingre løftet i vejret. Men der protesteres kraftigt, hvis man viser fire fingre samlet to og to: ”Det er ikke fire, det er 2 toere.” Så barnet kan skelne mellem eksistens og essens. Det ser, hvad der eksisterer i rum og tid, bundter med to i rum, optalt til to i tid. Et barns tal-sprog bygger på 2-dimensionale bundt-tal med enheder, som skolen kunne bygge videre på i stedet for at påtvinge barnet 1-dimensionale linje-tal uden enheder, der bygger på den grundantagelse, at 2 + 1 er 3 altid, og ikke kun hvis enhederne er ens. Dette til trods for at 2par + 1 er 5. Denne selvskabte og selvrefererende ’matema-tisme’ uden enheder er således altid er sand indenfor, men sjældent uden for skolen. Og ved at lade essensen kvæle eksistensen, kvæler matematismen også barnets eget tal-sprog og medfødte talsans. Hvorved skolen i stedet for almen tal-kyndighed skaber udbredt faglig eksklusion og tal-blindhed , der senere åbner op for skandaler inden for både det personlige og sociale liv. En skandale som forvandles til et mirakel ved at skolen bruger barnets eget tal-sprog.

Potens - Potensopløftning - Hvad er en potens i matematik? - Lær hurtig hvordan man regner med potens? - Potensregneregler.

Videoen forklarer hurtigt og enkelt hvordan man regner med potens og rod i matematik.
Populært kaldet at sætte noget i anden, i tredje osv.

*HJEMMESIDER OM MATEMATIK* 😃 (Video med en kort præsentation af de enkelte sider her: https://www.youtube.com/watch?v=nHfq43oEgxg )
👉 https://mattip.dk/ - Gratis opgaver og kopiark.
👉 https://matematikbogen.dk/ - Print let opgaver om plus, minus, gange og dividerer gratis.
👉 https://www.gratisskole.dk/ - Masser af gratis skolerelevante opgaver.
👉 https://www.legoglektie.dk/ - Hjemmeside med skolematerialer til børn fra 2-13 år. Gratis at bruge for private.
👉https://www.matematikbanken.dk/side/kompendier/ - Blandet opgaver målrettet 9-10 klasse.
👉https://www.opgaveskyen.dk/ - Opgaver til mange af folkeskolens fag. Klar til print.
👉https://undervisningsforlob.dk/matematik - Matematikopgaver og små spil klar til print. Målgruppe 5-12 år.
👉https://www.printland.dk/sjov-med-tal.aspx - Print opgaver til de helt små børn (børnehave og tidlig indskoling).
*BUTIKKER*
👉 *Reklamelink* - https://www.partner-ads.com/dk/klikbanner.php?partnerid=46683&bannerid=69642 - Online-butik hvor man kan købe *piktogrammer,* læringsspil, opgaver, tavler, legetøj og læringscirkler. *Stort udvalg*
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*APPS*
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*LEKTIEHJÆLP*
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👉 *Reklamelink* - https://www.partner-ads.com/dk/klikbanner.php?partnerid=46683&bannerid=76792 - BOOST dine matematikevner med et matematikforløb eller lektiehjælp.
*LÆRINGSCAMP*
👉https://www.dincamp.dk/camps/matematikcamp/ - Tag på camp i din ferie: Et sjovt fagligt boost i matematik (eller andre fag)


#Matematik
#Potens
#PotensRegneregler
#Potensopløftning
#PotensOgRoden
#UNIKSkole
#IAnden
#Regn
#RegnIAnden
#Lektier
#Lektiehjælp

#matematikbulmacası
#mathpuzzle
#bulmaca