West Contra Costa Unified School District
Divisibility Rules Justified
How do you know if a number is divisible? Instructors first prove the divisibility rules for three and four and then class members use this modeling to prove given divisibility rules for eight and nine either individually or in groups.
EngageNY
Divisibility Tests for 3 and 9
Who knew the sum of a number's digits gives such interesting information? The 18th installment of a 21-part module has scholars investigate division by three and nine. After looking at several examples, they develop divisibility tests...
Curated OER
How to Use the Rules of Divisibility and Estimation
Number patterns help your kids learn divisibility and estimation rules. This activity aims to strengthen their math fact memorization skills by presenting several rules they are expected to memorize through practice.
Curated OER
Spelling Rules
Have your learners discuss spelling rules using this presentation. Learners talk about identifying the number of syllables in a word, adding er, ed, or ing to a word, and spelling two syllable words with double consonants.
Flipped Math
Calculus AB/BC - Derivative Rules: Constant, Sum, Difference, and Constant Multiple
Use derivatives to find equations of lines. Pupils learn more rules to use as shortcuts to find derivatives. Using the rules, they find the equations of the tangent line and the normal line at a given point. Scholars then apply the new...
Curated OER
Divisibility Rules
Sixth graders strengthen their knowledge of the divisibility rules. Students access that mental math can be faster than the calculator for certain types of problems.
Students can make generalizations and discover patterns in finding the...
Curated OER
Casting Out Nines-- Divisibility By 9
In this math instructional activity, students learn the divisibility rule for 9s-- if the sum of the digits in the dividend is a multiple of 9, there will be no remainder in the quotient. Students complete 27 division problems with a 4...
Curated OER
Rewrite as Single Logarithm Using the Product Rule
In this Algebra II instructional activity, 11th graders rewrite the sums of logarithms as a single logarithm using the product rule. The one page instructional activity contains five problems. Answers are provided.
Curated OER
Special Products
In this special products learning exercise, 9th graders solve and complete 28 different problems that include using special products to multiply certain polynomials. First, they write each binomial twice and multiply using the FOIL...
Education Development Center
Consecutive Sums
Evaluate patterns of numbers through an engaging task. Scholars work collaboratively to determine a general rule reflecting the sum of consecutive positive integers. Multiple patterns emerge as learners explore different arrangements.
Curated OER
Reviewing the Rules
Young scholars participate in a group discussion to evaluate rules that the class created together. In this early childhood social studies lesson plan, students condense rules into categories and reword rules to be stated in the positive.
Curated OER
Divisibility
In this divisibility worksheet, 6th graders solve 10 different problems that include determining whether various numbers are divisible by other numbers. They write yes on the line provided if the number is divisible or no if the number...
CK-12 Foundation
Additive and Multiplicative Rules for Probability: Red Dress? Blue Dress? Both!
The sum of the parts is greater than the whole. An interactive uses a Venn-like model to show the percentage of females from a survey that have a blue dress, a red dress, or both. The pupils determine the numbers in each category...
Curated OER
Divisibility
In this divisibility worksheet, students read divisibility rules and then check the boxes in the chart if the 3 digit number can be divided by numbers 2 through 10. Students do this for 5, 3 digit numbers.
Curated OER
Divisibility Rules
In this divisibility rules worksheet, 6th graders read the divisibility rules, then apply these rules to solve 50 problems on 21 pages with answer key provided at the end.
Curated OER
Divisibility Rules
For this divisibility rules worksheet, students solve problems using the division rule for the number three. Examples and explanations are given prior to the exercise. This one-page worksheet contains approximately 20 problems.
Curated OER
Divisibility
In this division worksheet, students find the divisibility of whole numbers. Students fill-in a chart of numbers indicating whether they are divisible by other numbers.
Curated OER
Rules of Divisibillity
Sixth graders participate in a lesson that covers the Rules of Divisibility. They play a game for a warm-up before the direct instruction. Following the rules being covered they finish the lesson using an assignment included in the...
Curated OER
Divisibility
In this math worksheet, learners examine the 20 numbers in order to test their divisibility. The rules of divisibility are given at the top of the page.
Curated OER
Divisibility Buzz
Middle schoolers play Divisibility Buzz to reinforce divisibility rule for three.
Curated OER
Countdown Challenge: Tricks for Finding Multiples of 3 and 4
In this tricks for finding multiples instructional activity, students explore rules of divisibility. They compute the sum of the digits to determine if a number is divisible by three. Additionally, students identify the last two digits...
Curated OER
Simpson's Rule
In this Simpson's Rule worksheet, students use the Fundamental Theorem of Calculus to determine the antiderivatives and evaluate integrals. They find the midpoint of given polygons and sketch the graph of the function. This nine-page...
Improving Measurement and Geometry in Elementary Schools
The Sum of the Interior Angles of a Polygon
Junior geometers discover that polygons can be decomposed into triangles and that the number of triangles can be determined by a rule. Note that the Geometer’s Sketchpad® software is required to carry out all components of this lesson.
Curated OER
Column Addition Rules
Expanded column addition is when a child breaks down each place value into its component numbers then adds all the sums together. Present the rules of expanded addition to help learners understand what it actually means to add multiple...