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U n t er r i ch t spl a n
Ad d it io n up t o 15 b y R e l at ing
Pic t ure s and Numb e rs
Altersgruppe: K i nde r gar t e n, 1st Gr ade
Virginia - Mathematics Standards of Learning (2009): 1.5 , K .2a
Virginia - Mathematics Standards of Learning (2016): 1.6, K .1.a,
K .3 .a
Fairfax County Public Schools Program of Studies: 1.5 .a.1, 1.5 .a.2,
K .2.a.2, P r e K .16.a.2, P r e K .5 .a.1
Online-Ressourcen: H o p o n t he B us
T eacher
present s
St udent s
pract ice
6
8
15
8
5
3
min
min
min
min
min
min
Opening
Class
discussion
T eacher
present s
M at h Obj e c t i v e s
E x pe r i e nc e addition with visual support
P r ac t i c e addition up to 15
L e ar n to add with the help of pictures
De v e l o p addition strategies
Ope ni ng | 6 min
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Closing
2
Draw 3 circles, 5 squares and 7 triangles on the board.
A sk : How many circles are there in all?
3.
Write 3 below the circles.
A sk: How many squares are there in all?
5.
Write 5 below the squares.
A sk: How many triangles are there in all?
7.
Write 7 below the triangles.
A sk: How many shapes are there in all?
S ay: To find this let us add the circles and squares first. 3 + 5 = 8.
Now, add the total number of triangles to 8. 8 + 7 = 15.
S ay : There are 15 shapes all together.
A sk : Do you think we will get the same answer if we add triangles
and squares first?
S ay: Let’s find out. 7 + 5 = 12 and 12 + 3 = 15. We get the same
result!
S ay : Now, let’s add triangles and circles first and then add squares
to it. 7 + 3 = 10 and 10 + 5 = 15.
S ay : So we see that to add three numbers, we add any two numbers
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first and then add the remaining number to the result.
We will get the same answer no matter what numbers we add
together first.
It is easier to add the two numbers which add up to 10 first and
then add the remaining number. As in the case of 7 + 3 = 10 and 10
+ 5 = 15.
T e ac he r pr e se nt s M at h game : H o p o n t he B us - A dd up t o
15 | 8 min
Present Matific’s episode H o p o n t h e B u s - A d d u p t o 1 5 to the class,
using the projector or interactive whiteboard.
The goal of the episode is to learn and practice addition up to 15 with two
and three addends.
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4
Play the instructions.
A sk : How many dogs are on the bus?
0.
A sk: How many dogs are standing at the bus stop #A?
5.
S ay : Now count the number of dogs boarding the bus.
Show the students how to open the doors.
5.
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Fill 5 in the input box.
A sk: How many dogs are there on the bus now? Are there more
dogs on the bus now or fewer dogs or an equal number?
5. More.
The scene opens up to bus stop #B.
A sk: How many dogs are standing at the bus stop #B?
4.
S ay: Now count the number of dogs while boarding the bus.
4.
Fill 4 in the input box.
The screen will open up to a number sentence for addition (or bus stop #C).
The number sentence is displayed at the top of the screen. (The first set of
the game is with two addends)
If it is a number sentence, ask them to add the two numbers. Point out that
these numbers relate to the dogs that boarded the bus at respective stops.
A sk : How much is 5 + 4?
9.
Insert 9 in the input box. The screen will open up to the next set.
Repeat the process for bus stops #A and #B. Bus stop #A = 5 and bus stop
#B = 2. The screen will open up to bus stop #3.
A sk: How many dogs boarded the bus at stop #C?
4.
Insert 4 in the input box. The screen will open up to a number sentence.
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S ay : To find how many dogs boarded the bus in all, we need to add
5, 2 and 4 together. For that we will add 5 and 2 first and then add 4
to the result.
A sk : How much is 5 + 2?
7.
A sk : How much is 7 + 4?
11.
Fill 11 in the input box.
If the answer is incorrect, the answer cell will change colour, and the
instructions will wiggle.
Remind the students that they can use any two numbers to add first.
The episode will present a total of four sets of questions.
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S t ude nt s pr ac t i c e M at h game : H o p o n t he B us - A dd up t o
15 | 15 min
Have the students play Matific’s episode H o p o n t h e B u s - A d d u p t o
1 5 on their personal devices.
Circulate, answering questions as necessary.
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C l ass di sc ussi o n | 8 min
S ay : Write the number sentence and add if 2 dogs board a bus at
stop A, 5 dogs board at stop B, and 5 dogs board at stop C.
2+ 5 + 5 =?
12
A sk : Which two numbers did you add first?
S ay : Suppose all the dogs from stop C reach stop B and board the
bus from stop B,
A sk : How many dogs board the bus from stop C?
0
A sk : How many dogs board the bus from stop B?
10
A sk : How many dogs board the bus in all?
12
Explain that the total number of dogs does not change if they move from one
stop to another.
Encourage the class to make more such addition stories.
T e ac he r pr e se nt s M at h game : H o p o n t he B us - A dd up t o
8 | 5 min
Say that you will show them a similar game which they can play as
homework. This game has only two addends.
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Present Matific’s episode H o p o n t h e B u s - A d d u p t o 8 to the class,
using the projector or interactive whiteboard in Preset Mode.
A sk: How many dogs are standing at the bus stop #A?
3.
Open the bus door.
A sk: How many dogs boarded the bus at stop #A?
3.
Fill 3 in the input box. The scene opens up to bus stop #B.
A sk: How many dogs are standing at the bus stop #B?
2.
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Open the bus door.
A sk : How many dogs boarded the bus at stop #B?
2.
Fill 2 in the input box. The screen will open up to a number sentence for
addition.
A sk: How much is 3 + 2?
5.
Fill 5 in the input box.
If the time permits, encourage the students to complete the remaining set.
C l o si ng | 3 min
We learned that we can add three numbers by adding any two numbers and
adding the remaining number to the result.
We can add different types of things.
A sk: How many people are there in all if there are 5 girls, 2 boys
and 1 woman?
8.
A sk : Which two numbers did you add first?
Point out that they get the same answer.
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