Reflection: Lesson Planning Multiplying Decimals - Section 3: Partner Practice


You may notice that in this lesson, there aren't many problems that ask students to simply multiply two numbers together (e.g. - 4.56 x 3.2 = ).  This is a deliberate choice on my end, to work to meet the demands of the Common Core standards.

The majority of problems I ask students to complete are real-world application problems.  I want my students to persevere in solving more complex problems, and work to make sense of problems.    

I do have three rote problems at the end of the Independent Practice problem set.  They are there for two reasons:

1) if students do finish the application problems quickly, they can get more practice in

2) if I have students who are struggling to make sense of the application problems, I can direct them to the more straightforward problems first.  I can work with individual students on process, if I need to.

One trade-off here is that my students don't get a large number of practice problems during the lesson.  I'm okay with that.  I'd rather they make meaning of problems and discover when they might need to multiply decimals by decimals.  I also want to catch any misconceptions before students have practiced something incorrectly over and over.

I do give my students straightforward arithmetic problems each night on their homework - one or two, interspersed with other problem types.  They also have fluency work during my cumulative review portion of my classes.

  Rigor vs. Rote Practice
  Lesson Planning: Rigor vs. Rote Practice
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Multiplying Decimals

Unit 1: Number Sense
Lesson 16 of 19

Objective: SWBAT multiply multi-digit decimal numbers greater than 1 by numbers greater than 1.

Big Idea: Since decimals are an extension of the base-ten number system, the same algorithms for calculating with whole numbers apply to decimals.

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10 teachers like this lesson
Math, Decimals, Number Sense and Operations, division of Korea, factoring polynomial expressions, multiplication, estimation, multiples, distributive property, greatest common factor, least common multiple, multiplying
  60 minutes
multiplying decimals resized
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