# #Symbaloo Webmix: Place Value and Numbers 1-100 for 1st/2nd Class

Symbaloo Webmixes are such a great way of keeping a catalogue of useful websites. You can see other ones for Maths, English, Irish, Music and Coding HERE.

# Useful Visualization of Prime & Composite Numbers on Datapointed.net

This has been a good week for finding resources on the internet

for teaching maths. On Monday the Google Doodle celebrating

the birthday of John Venn featured an interactive animation which

I thought would be very useful to introduce students to

Venn Diagrams and specifically to

illustrate the intersection of two sets.

You can see that here.

Today on the @WeAreTeachers twitter feed I came across

the visually arresting

which one could use to help students visualize

prime and composite numbers.

These patterns are quite mesmerizing and demonstrate

the beauty of maths. I would use it to help students learn

about factors and to understand the difference between

prime and composite number.

I might also use it occasionally as a ‘drill’ where the student

would call out ‘prime’ or ‘composite’ so as to become familiar

with these words themselves.

I would also be interested in their hypnotic or soporific effects 😉

# Online activities to learn about and revise factors, prime and composite numbers.

Photo Credit: Chris via Compfight

1. Revising tables and factors on the 100 square

3. Four useful activities from

Cool Math.com to learn about prime and composite numbers.

5. Scroll down to the bottom of this link

to find an activity to practice

spotting prime

or composite numbers

from AAA Maths.com

6. From Sheppard Software.com

‘Fruit Shoot’ – A game to revise composite + prime numbers

7. A Treasure Trove of ideas here from Edutopia.org

Photo Credit: Keith Bloomfield via Compfight

# Online Games to practice Addition,Subtraction & Clock Time for 1st/2nd Class

We have been using these games to practice our maths in class

1. Great Subtraction Practice

Try The Subtraction Wall

We are really enjoying this one.

2. Another game to practice subtraction.

Key in the correct security code

by completing a number of take away sums

and as a reward the student gets to design a superhero.

Super Hero Costume Game

This game certainly has its fans in 2nd Class Room 6.

3. Challenge: Football Themed Two Digit Addition

Looks like fun

Our football fans enjoy this one.

4. This one is a new addition.

Watch out because it gets quicker

and quicker as you go up the levels.

Maths Barge Game from Ohio Distinctive.com

5. Clock time game

Have fun with clock time

6. Another game to revise clock time

Telling the time

7. Lots more maths games from BBC

Lots more maths games

Try one!

They’re fun!

Acknowledging the help of this great accumulation of websites on Ms. Horst’s Class Blog

Ms.Horst’s Class Website

To know another teacher has found a website useful

age appropriate educational websites.

# How Well Do You Know Your Tables? We Challenge YOU!

Balloon Popping Fun

The class record in 680 in mixed addition and 674 in subtraction!

Would you like to try it?

You are very welcome to try multiplication and division also.

Balloon Popping Game

If you would like to tell us how you did,

and enter your score in the comment box.

Do tell us how you get on 🙂

from 2nd Class, Room 6

# Explaining subtraction with ‘renaming’ for the parents of 2nd class Room 6

At the moment the children are learning subtraction with ‘renaming’.

This methodology is required for example when you are doing a sum like:

T U

4 3

-3 5

_______

The student starts ‘taking away’ the units and realises that they can’t take 5 from 3.

We are doing subtraction with ‘renaming’ in school.

We have done a lot of practical work using Dienes Blocks.

We are at the early stages of learning how to do these kind of sums.

At the moment, for homework, the majority of the class are getting

a worksheet of subtraction without renaming.

This has caused some confusion as the children attempted to ‘rename’

when it wasn’t necessary.

Identifying when a sum will need ‘renaming’ is a skill in itself

and one which we are working on!

More confusion can arise because some parents may have learned

how to do this kind of subtraction using the

‘borrow and pay back’  method.

Another factor that may confuse you is that ‘renaming’ is also referred to as ‘regrouping’!

You might find this Tips Sheet from the NCCA helpful:

NCCA’s Tipsheet for Parents: Helping your child with subtraction

or on the Maths is Fun website below where the methodology is clearly demonstrated:

A demonstration of ‘renaming’ on the Maths is Fun website

Strategies we use – Bridging the Ten

I have found that the children who know their tables are completing these sums sooner than the children who don’t.

I am encouraging the children who find tables hard to use strategies to help them.

You might hear them talk, for example about ‘bridging the ten’.

Ask a child to take 7 from 10 and they will say 3 with confidence.

This is because they are very sure of ‘what makes 10’.

However when one asks a child a sum like 17 take away 9, they are less sure of the answer.

One of the solutions is for the child to learn the ‘make up’ of 20

and be as sure of it as they are of ‘what makes’ 10.

Again, we are working on this!

The other solution is that the child learns to ‘bridge the 10’.

Take that sum 17-9 again:

The children are fairly secure in the knowledge that 7 steps will bring them back to 10

‘Nine is one less than ten. So you add 7 and 1 and the answer is eight’.

Just in case you missed it…

I am reposting the link the the post on this blog on the importance of learning tables.

Thank you for your continuing interest and support.

Look what you can do with K’nex. Nice work Senan!

# Plan for Maths in 2nd Class: Number

The Irish Primary School Curriculum in Maths is made up of a number of strands:
Number, Measurement, Shape and space, Data and Algebra.

Learning Addition and Subtraction Tables is a very important aspect of learning maths in 2nd Class.

Adding and taking away tens and units is the ‘big deal’ in the second class maths curriculum. This is made so much easier if the children know their tables ‘upside down and inside out’.

It means when I go on to teach adding tens and units the children can focus on ‘the method’ and not on the ‘sum’. It can be disheartening for a child to get ‘the method’ right but the answer wrong because of a mistake in computation.

I realise the early tables can be very easy for children who have an aptitude for maths. Learning tables is like climbing a mountain – and we are in the foothills at the moment! I will be sending home tables for homework from the beginning of October. We have been revising adding and taking away to 5, thoroughly in school during the month of September.

The children can practise tables for homework in a variety of ways; singing the table, using their hands to keep them on track i.e. where they are in the table, lollipop sticks, number line and table book.

We use Joyce O’Hara’s cd: Joyce O’Hara’s Learn Through Song
I am sending home a laminated A4 page of the tables, in case your child does not have a table book. Please keep these carefully.

I will also make a lot of use of the addition square.
We start off gradually but we are working towards the challenge of a ‘Five Minute Maths Frenzy’!
Five Minute Maths Frenzy

The children use concrete materials to help us understand the maths we do in a ‘hands on’ and practical way. Each child has a Number Bag containing a number line and hundred square, a clock, unifix cubes, lollipop sticks, dice, pegs and a peg board. We also keep a dry board marker and a cloth in this bag, for working on individual whiteboards.

Initially I encourages the children to try Free Play with the contents of the bags. This is popular on wet days when we can’t go out to the yard. We can make patterns and constructions. We can also play dice games like ‘Race for 100’. One of the advantages of familiarity with the contents of the bags is that when we go to ‘work’ with them, the children are less inclined to play around with them, as they have had plenty of opportunities to do this already.

Children’s Work
Here is some examples of the Free Play the children did today. The results certainly brightened up a rather wet lunch time for me. Can you spot the ‘smiley face’ by Zac and ‘teacher teaching the children’ by Kila? Can you see the imaginative ‘cup cakes’ and robots?

Make your own photo slideshow at Animoto.