Hello again I'm Claire today I'm going to talk to you about numbers and counting
you'll need something to write with and something to write on
post-it notes are perfect and a texta or a pencil. Our learning intention in
this lesson is counting in fives and tens with the numbers one to one hundred we're going to
practice counting collections of ten we're going to count to a hundred in tens and we're going to
practice counting collections of fives and we'll count to a hundred in fives and then we're going
to locate some of the numbers on the hundreds chart. In lesson one we counted to 100 backwards
and forwards and we counted all sorts of things we counted all my teddies and we counted some cars
and we counted lots and lots of things. In lesson two we learned there's more than one way to count
we learned to count in twos we counted on our shoes two four six eight ten we had lots of shoes
did you count your shoes, since I last saw you we also learned that sometimes you don't need
to count to know how many and that was called subitising can you say that word subitising
again very good. Subitising that's when you know instantly how many there are without having to
count now if you didn't look at lesson one and lesson two you might want to look at them now
if you did look at lesson one and lesson two have you been practicing your counting since
I last saw you? Can you count to a hundred now, can you bounce the ball a hundred times
did you also practice subitising did you make your own subitising cards maybe you played a
few dice games and can subitise really quickly to six. Maybe you played dominoes I have a tiny
domino set here look at my domino's set can you subitise that number oh very good it's six
what about this one well done five. Dominoes is a great way to practice your subitizing.
Now we learnt all about how you count we learned that you can count things
that are in a big pile we learned that we can count things that are in a row we learned lots
of things about counting but we learnt those really important things that when
you're counting you need to count each item. Let's remember by counting our cars one two three four
five six seven whoops eight nine ten eleven isn't that amazing. Okay now if I wanted to
I could make my own subitise cards remember these ones and you had a go at them yesterday let's see
how good you are out of them today let's have a look. These are mine okay but I know that you
made some of your own so you can try your own on the family members around you but let's try mine
just for a quick thing now you've been looking at that for a while so you probably have worked out
that that's two and one more which is three well done okay let me show you this one
oh I know you got that one straight away what was it it was three very good oh and what's that one
yes three again let's have a look that's the easy one isn't how many is that one
excellent okay and this one here's a tricky one I put some tricky ones in here today just to see how
good you can get. Now some of you when you looked at that may have seen that there was a three here
and a three there and two in the middle so three and three with six and two more made it eight did
you get that that was a tricky one. All right, how about this one oh do you want to see it again
did some of you see that there was four there and three more makes seven maybe you saw it the other
around maybe you saw three here and four more makes seven that's seven on our subitising card.
Here's another very tricky one who was able to see that there was three and another three which makes
six and another three which makes nine and one more which makes ten super job subitising is a
very important thing for learning in mathematics so I'd like you to make your own subitising cards
you may have done it already you may have them beside you and if you haven't done it
I'd like you actually to do it after this lesson and post-it notes are perfect things
for doing your subitising on. Let me show you I'm going to do a subitising card
and you're going to tell me how many how many two, excellent now you can do that
with your family and friends or you can just test yourself you can make a whole lot of subtitising
cards you can mix them up and then you can play yourself you can see can you read them.
I want to show you something really special in subitising cards right now
because when I asked the children in Port Lincoln primary school to make some subitiisng cards
they made them with fish can you tell me how many fish there are on that one?
Excellent there are three how about this one, two you might want to make
some really special subitising cards like the Port Lincoln primary school kids did.
Okay now do you remember yesterday we were counting in twos we counted all my shoes some
of you counted your shoes I know that and we found out that all of these numbers were in lines on our
hundreds chart do you remember that we were able to put a little dot every time we counted in twos
2 4 6 8 10 12 14 16 18 20 22 24 26 28 30. Now counting in twos is really handy isn't it and I'm
going to just check that you can count from twos from a very high number okay so I'm going to say
88 okay can you find 88 on your numbers chart or can you see it on mine 88. Oh I'm going to go down
here until I see the eighth there we go 80 8 oh there it is 88. We're counting in twos starting
from 88, are you ready 88 90 92 94 96 98 100 were you able to do that with me? Very good, all right
I'm going to ask you to count in twos from 14 can you find the number 14 on your numbers chart can
you hear that I'm saying that word very carefully so you can hear the teen bit 14, oh there's 14.
Let's just count in twos until we get to 20. 14 what's next
16 good what's next 18 well done and now we're at
20 very good we can count and choose. All right let's do something a little bit different now
I want you to get your pen and your paper and I want you to write down all the numbers one
two three four five six seven eight nine ten can you write them on your piece of paper
now? While you're doing that I'm going to write them on the board okay so you write
Okay do your numbers look like mine? You might have done one on each page of your
post-it notes it doesn't really matter but what I'd like you to do right now is to put a circle
on your favourite number can you put a circle on your favourite number
actually I'm going to guess what your favourite number is let me see I'm thinking you might be
six and you may have put that as your favourite number,
lots of people do that but I put my circle on this number.
That's strange isn't it well do you know why I put my circle on 10 because that's a mathematician's
favourite number and I like to be a mathematician and I know you would
like to be a mathematician too. So let's talk about ten, should we talk about ten.
Tens are really very lucky numbers and we often call them the friendly number a ten is a friendly
number because it's very easy to count to and from and to add things to and so we're going to learn
lots about 10 today. Do you know, somebody in my class said to me that real mathematicians
count in tens, yesterday we counted in ones and we counted in twos. Today let's count in tens
all right let's have a look at where that magic number is 10 and if I get 10 more it's 20
and 10 more is 30, so this is counting in tens 10 20 30 40 50 60 70 80 90 100. Can you
count in tens now counting in tens can be very quick can't it and it's very handy when you've
got lots and lots of things to count so look at my paper clips here I had so many of them
I thought it would be easier if I made them into groups of ten so now I can count 10 20 30 40 50
60. What's my total remember total is how many you've got all together it's the last number you
counted my total is 60. Could you write it down on your post-it note or piece of paper I have 60
let's see does your 60 look like mine I have 60 paper clips very good, very good,
excellent. So counting in tens can be very handy especially if you've got a lot of things all right
in other parts of the world they use an abacus to count to ten have you ever seen an abacus?
An abacus is a frame with beads on it now I don't have an abacus but I have something like
an abacus I'd like you to have a look at I made my abacus so this is my abacus can you see it,
it's beads on a string you can make this too
and it really is very helpful for counting because I have put in five red beads
five yellow ones now if there's five red and five yellow how many are there all together
10 well done and then I have another 5 that makes 15 and another one
and that makes 20. So an abacus is very handy for counting things and people in Asia still
like to use them and they're very fast at using them you might want to make yourself
your own abacus using string and beads this afternoon. You can make your abacus like mine in
patterns of five or you might want to make it in patterns of ten you can have a go at that one.
Now I think 10 is a fabulous number but I know that some people prefer to count in fives
I know that some of my students in year one are really good at counting fives are you
really good at counting fives? Perhaps you are, let's have a look at fives on our number chart
let me see can we count in fives using the hundreds chart let's go 5 10 15 20 25 30 35
40 45 50 55 60 65 70 75 80 85 19 95 100. Oh now I know why my children in year one likes to count in
fives it's a lot of fun isn't it, should we do it really fast, you do it with me are you ready
5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100. Can you do it that fast
why don't you practice that at home you can practice
with all sorts of things at home you could even do it with your bead set if you made 5 10 15
20 then I could go back the other way 25 30 35 40. Counting with fives is a lot of fun.
Okay I'm going to stop here for today and I'm going to remind you what you learned today. We
learned to count in tens we learned to count in fives we had another look at the hundreds chart
we counted a lot of things that we had around the table we did a bit more subitising
after this lesson I'd like you to show your dot cards that you made to someone and see if
they can subitise just as you or you can just practice subitising yourself I'd also like you
to practice counting in fives and tens. How about you put your toys into groups of five and record
how many that's called the total. What's the total number of toys you have? You can count
them more easily if you put them into groups of five or groups of ten I made my duplo box blocks
into groups of five because it's much easier to count them than when they were loose so I've got 5
10 15 20 25 30 super blocks you can do that with your lego or duplo box at home. Other suggestions
and I can hear people already thinking is you could use leaves or stones or beads or counters
or shells great work counting today I will see you next time bye