Beacon Lesson Plan Library
Multiplying by 3
Jennifer Catlett Bay District Schools
Description
The students practice the multiples of three as an introduction to multiplying by three.
Objectives
The student understands and explains the effects of addition, subtraction, and multiplication on whole numbers, decimals, and fractions, including mixed numbers, and the effects of division on whole numbers, including the inverse relationship of multiplication and division.
The student describes a wide variety of patterns and relationships through models, such as manipulatives, tables, graphs, rules using algebraic symbols.
Materials
Beacon Student Web Lesson Access
Number lines (030) drawn on 68 feet of paper
Counters
Paper plates
Index cards
Baggies
Math Journals
Preparations
Collect and prepare materials to be used. (paper plates, counters, Web School link3 is the Magic Number, baggies, pens, index cards, butcher paper (68 feet long and draw the number line 030 on it), Math Journals
Task cards for centers if necessary
Procedures
1. Count by 1s, 2s, and 3s around the room.
2. Add. 3+3; 3+3+3; 3+3+3+3; 3+3+3+3+3.
3. Model any number that is a multiple of 3 using counters and circles on the overhead, and show a multiplication problem.
Example: 24=3x8; Draw 3 circles and place 8 counters in each circle.
Group Work:
Divide the students into groups of four or five for centers. Try to rotate the groups every 1015 minutes.
Center #1 Beacon Interactive Web Lesson: 3 is the Magic Number
Center #2 Give the group paper plates and counters. Using multiples of three. come up with as many multiplication problems as possible. Make sure that one student is the recorder.
Center #3 Have students make their 3s multiplication facts for their personal multiplication baggy book. Teacher assistance is required. Note: Use index cards and plastic baggies.
Center #4 Numberline activity.
Materials: counters, number line(030) drawn on 68 feet paper.
* Students use counters to show 3+3+3.
* Place the numberline on the floor. Students demonstrate skip counting by hopping from 3 to 6 to 9.
* Students repeat the process to find 3x4, 3x7, and so on.
* They use repeated addition to check their products.
Center #5 Math Journals
Students will write the multiplication facts for 3s and check their answers together. They will respond to the prompt How do you multiply by 3s?
WrapUp:
1. Have students return to their seats.
2. Discuss what they know about multiplying by three. Review examples of multiplying by 3s on the board allowing students to generate the answers.
3. Homework: Practice finding multiples of three in the real world. Record findings in journal.
Assessments
Teacher will assess students through
~observation of students talking about applying how to multiply by three using multiples at station work
~Completed Math Journal that explains how to multiply by three and how to use multiples of three to check the answers
~Students' work samples that show application of using multiples to solve problems
