This week, our first graders started with brand new Math Switch groups and a new math unit on Halves and Doubles! We first started out sketching a whole number geometrically on our whiteboard grids. Next, we discussed what it might look like to “double” this number. We concluded that the word double also means 2 groups of something. Knowing this also helped our first graders to write equations to go along with doubles.
Next, we moved to “halves”. Our students were able to create a definition of their own for the quantity of half… To find half of a number, you split the total into two equal groups. And that is just what we practiced! The easiest way to solve doubles and halves is to draw a simple picture such as circles. For some it was easiest to use the “dealing method”. This helped our students to visually practice how to split the number into two equal groups by “dealing” one circle at a time to each of the two groups until they reach the total.
Next week our mathematicians will begin to work with Circle Graphs!