Teaching

Distribute computers / Ipads and all students enter the kojo page

• Joint / teacher-led start
• Make sure everyone has the grid code from the previous lesson
• Students draw a grid.

in the previous lesson we build a grid, but it is not a chessboard yet, we need to fill every other box

show the film about some useful commands (fill, penColor, …jumpTo):

Have students test and with the fill function setFillColor(colour)

Start with filling a square with different colours.

def square = {repeat (4) {forward; left}}

setFillColor(black)

square

Discuss together how we can fix the filling of every other box.

def square = {repeat (4) {forward; left}}

setFillColor(black)

square

hop

setFillColor(white)

square

and how to get a bar. Let the students test to solve the problem first on their own.

Discuss some possible solutions. Here is one of them:

def square = repeat (4) {forward; right}

def bar= {repeat (4) {setFillColor (black)

square

hop

setFillColor(white)

square

hop}

}

bar

Tip: Two different bars are needed.

This is a more advanced exercise. You can give them a part of a code and the students complete the code.

bar 1 starts with a black square, bar 2 starts with a wihte box:

here is the code for bar 1:

def square = repeat (4) {forward; right}

def bar1= {repeat (4) {setFillColor (black)

square

hop

setFillColor(white)

square

hop}

}

Asked the students how to change the code.Here is the code for bar 2:

//def square = repeat (4) {forward; right}

def bar2= {repeat (4) {setFillColor (white)

square

hop

setFillColor(black)

square

hop}

}

Now you can make a chessboard:

def chessboard = {

repeat (4) {

bar1

hop(-200)

right

forward

left

bar 2

hop(-200)

right

forward

left

}}

chessboard

If you want to have it faster choose : setSpeed(fast) at the beginning of your code.

let some students try to figure out how to do the notation code.

But it takes A, B, C,…

With the write function you can fix it!

write("A")

hop

write("B")

hop

write("C")

hop

write("D")

hop

write("E")

hop

write("F")

hop

write("G")

hop

write("H")

hop(-200)

and so it is taken 1,2,3,…

try different ways to do it! Use invisible, then the turtle is not visible and with setPenColor (green) you change the colour of the pen

right

forward

left

write ("1   2    3    4    5    6    7    8")    or maybe better with

write ("1     2      3      4      5      6      7      8")

try with different spaces between the numbers to get it right.

show the notation code, discuss in class how to get it right with space between the numbers.

or give the students the code and they try by themselves.

Now we soon have a chessboard and can play! Show the whole program and/or give the code to the students.

setSpeed(fast)

def square = repeat (4) {forward; right}

def bar1 = {

repeat (4) {setFillColor(black)

square

hop

setFillColor(white)

square

hop}

}

def bar2= {

repeat (4) {setFillColor (white)

square

hop

setFillColor(black)

square

hop}

}

def chessboard = {

repeat (4) {

bar1

hop(-200)

right

forward

left

bar2

hop(-200)

right

forward

left

}}

write("A")

hop

write("B")

hop

write("C")

hop

write("D")

hop

write("E")

hop

write("F")

hop

write("G")

hop

write("H")

hop(-200)

setPenColor(noColor)

right

forward

left

setPenColor (red)

write ("1          2            3           4         5         6          7            8")

setPosition (25, -20)

chessboard

Try out to start at the right position for the notation and/or the chessboard. Choose setPosition(-25,25) or a similar one.

Compare the students' results with the commands board and notation.

Repetition of different commands in kojo

Together with the students, you make a list of different commands:

forward, right, left, backward,

circle (50)

fill (colour)

mm.

You find a list in appendix 1 for this lesson.

5)     Group 2-2: each student draws their own chess piece in a kojo.

Encourage students to use all parts of SARA. Encourage the exchange of ideas and especially programming tips.

Ask students to present their pieces and look at the code together. Praise the results.

Rounding

When there are five minutes left in the lesson, tell the children to pack up. You gather at Meeting place and the teacher summarizes what the children have learned during the lesson.

●      Repeat all concepts in SARA

●      Everyone does the sequence together:

stand - repeat (4) {jump; spin} - "Hello then" - jump - "thank you for today" - if (black shoes) wave otherwise {jump} - sit

●     Hi then until next week.

Appendix

Download the Worksheet