Math in the Fourth Grade By John Griffin Cook, Elijah F. Harris and Jack Lille Yerington

In math the fourth grade is learning about geometry. One of the things that helps us is the geoboards. When we use geoboards we have to find out the area of shapes. We find the area of shapes by using square units. We are not only using geoboards, we’re using symmetry. Kids have to find out the area of a shape by taking different triangles and putting them together to see if they add up to a full square. We’re decomposing shapes in order to find out how many squares are in their area. We are also learning about angles like the acute angle, the right angle, and the obtuse angle. A trick to find out how to make an acute, obtuse, or right angle is to point at yourself and say “I’m cute” for an acute angle , to point at your friend and say “You’re obtuse”, and to point at the ceiling for a right angle.