This site features a video overview of Addition (Sums to Twenty) for 1st Graders.
This short video and interactive assessment activity is designed to teach second graders an overview of addition (sums to 20).
This short video and interactive assessment activity is designed to teach second graders about subtraction: selecting the correct sentence.
This short video and interactive assessment activity is designed to teach third graders about dividing to find the amount.
This short video and interactive assessment activity is designed to teach fourth graders about division terms.
This short video and interactive assessment activity is designed to teach fourth graders about using multiplication replacement to find a new amount.
This short video and interactive assessment activity is designed to teach fourth graders about multiple rounds of multiplication - multiplying 3 digits by 1 digit.
This short video and interactive assessment activity is designed to teach second graders about fluency in subtraction (numbers up to 20).
This short video and interactive assessment activity is designed to teach second graders about selecting the correct subtraction sentence.
This short video and interactive assessment activity is designed to teach second graders about addition: selecting the correct sentence.
This video and accompanying interactive assessment practice was designed to teach completing the subtraction sequence to first graders.
This task gives children an opportunity to subtract a three-digit number including a zero that requires regrouping. The solutions show how students can solve this problem before they have learned the traditional algorithm.
This task requires students to add tenths and hundredths.
The purpose of this task is to help students see the connection between aÖb and ab in a particular concrete example. The relationship between the division problem 3Ö8 and the fraction 3/8 is actually very subtle.
This task addresses the division problem 4Ö1/3.
This task provides a context for performing division of a whole number by a unit fraction. This problem is a "How many groups?'' example of division.
Students play a game in pairs to read and recognize numbers using a 100 chart.
This short video and interactive assessment activity is designed to teach fourth graders about selecting the quotient using given statements.
This short video and interactive assessment activity is designed to teach fifth graders about selecting the quotient with the correct number of digits.
This short video and interactive assessment activity is designed to teach second graders about selecting the incorrect subtraction sentence (numbers up to 20).