These concept videos were produced as part of our Bakersfield City School District ABACUS Monthly series.
Educators hold an armory of devices to recall which symbols mean "less than" or "Greater than"...but why were those symbols chosen, and what role does the number line play?
Multiplying and Dividing Fractions and Decimals
Decomposing fractions and decimals allow for the area model to take hold when exploring multiplication and division beyond whole numbers.
Long division is regarded by many as the point in their math learning when they stopped loving the subject. In reality, a partial sum approach can be more efficient and grounded in friendly multiples.
Euclid is My Homeboy
What if you could find greatest common factor using only subtraction? Euclid had you covered 2,400 years ago.
Open Number Lines
When students build their own visuals, everyone wins. An open number line allows deeper concepts, such as flexible place values and difference as the distance between two points, to take hold.
Fractions and Polygons: Perfect Together
Any regular polygon can be easily broken into equal-sized triangles...so why aren't we using this when we introduce fractions? See how!
Egg Carton Fractions
The egg carton, with its 12 compartments, can be turned into a handy manipulative in exploring concepts of fractions.
Foldable Number Line
Any post-it note or index card can become a number line, and a paper clip can become the vehicle to explore.