This short video and interactive assessment activity is designed to teach fourth graders about subtraction: completing the subtraction sentence.
This short video and interactive assessment activity is designed to teach third graders about subtraction: completing the subtraction sentence.
This is a video and interactive assessment activity designed to help first graders learn about subtraction word problems up to twenty.
This short video and interactive assessment activity is designed to teach second graders an overview of subtraction (numbers up to 10).
This short video and interactive assessment activity is designed to teach second graders about subtracting by counting backward with pictures.
This course features a video review and an assessment practice of subtracting by crossing out with pictures for word problems. It is aimed at first grade math students.
This short video and interactive assessment activity is designed to give fourth graders an overview of addition (sums to 1,000).
This short video and interactive assessment activity is designed to teach second graders an overview of addition (sums to 1,000).
This short video and interactive assessment activity is designed to teach third graders an overview of addition (sums to 1,000).
This task presents an incomplete problem and asks students to choose numbers to subtract (subtrahends) so that the resulting problem requires different types of regrouping. This way students have to recognize the pattern and not just follow a memorized algorithm--in other words, they have to think about what happens in the subtraction process when we regroup. This task is appropriate to use after students have learned the standard US algorithm.
Students develop a physical understanding for the meaning of equality by trying to find equal lengths using rods.
This task helps students broaden and deepen their understanding of the equals sign and equality.
The words compose and decompose are used to describe actions that young students learn as they acquire knowledge of small numbers by putting them together and taking them apart. This understanding is a bridge between counting and knowing number combinations. It is how instant recognition of small numbers develops and leads naturally to later understanding of fact families. This task helps them develop an understanding of number combinations.