Today we learned about and applied algebra outdoors! Algebra is used in Maths when we do not know the exact numbers in a calculation. In algebra we usually use letters to represent unknown values or values that can change. Today, however, we used natural materials from the playground to represent numbers in a calculation. Once we worked out the values of our objects we used them in calculations with a new object where the value was unknown. We then had to work out the value of the new object and stretch the brains of our friends by challenging them to crack the code!