To perform the last challenge we asked our students to make meetings with their partners..

even if it was not not obvious because it was the end of the school year with its exam , they did it...

group number 1 : click here 

group number 2 : click here 

group number 3 : click here 

group number 4 : click here 

group number 5 : click here 

group number 6 : click here