## Tuesday, September 3, 2013 - Dividing Decimals by Decimals

__Bell Work__Students continued to practice applying their skills of adding, subtracting, and multiplying decimals through finding the (1) discount, (2) new price, (3) sales tax, (4) and total cost of a magic set. While working on Bell Work, students who did not turn in their work last Friday were seen to check off the 4 items they completed at 25 points each. The process shown below was demonstrated and left on the board last Thursday to assist students as they worked with their partner(s).

Today, students were instructed that this will be the only quarter where they will be allowed to redo assignments and turn in late work during tutoring hours. This should help students adjust to my grading expectations and the rigor of middle school.

**After Quarter 1, students will not be allowed to turn in work late or redo any assignment.**

__Classwork__Students checked their work from "Sales Tax and Discounts," which is attached below. Afterwards, we began examining the algorithm for dividing decimals by decimals. How and why we move the decimal point out of the divisor was explored through strings of equivalent fractions which can be found on the following PowerPoint. When multiplying a decimal by Powers of 10, the decimal point shifts to the right. When dividing a decimal by Powers of 10, the decimal point shifts to the left. For practice, students completed problems using the Holt textbook p.139 #2-30 even. We will continue to practice tomorrow at which time I will show students how to access the online textbook.

2013.08.28_to_30_classwork_sales_tax_and_discounts_1.pptx | |

File Size: | 760 kb |

File Type: | pptx |

2013.09.03_2_activating_dividing_decimals_by_decimals.pptx | |

File Size: | 116 kb |

File Type: | pptx |

## Wednesday, September 4, 2013 - Dividing Decimals by Decimals

**Grocery List Project was due today and collected during Bellwork.**

__Bell Work__Using addition, subtraction and multiplication algorithms for decimals, students found the discount, new price, sales tax and final price of the Mining Kit. Afterwards, students examined the part to whole relationship between the new price and original price of the Mining Kit, and they examined a concept called "percent of a number."

**A quiz over Sales Tax and Discounts is scheduled for Friday, September 6.**

__Classwork__I showed a few classes the following PowerPoint to further support the understanding that when we multiply decimals by Powers of 10, the decimal moves to the right. Similarly, when we divide decimals by powers of 10 the decimal moves to the left. This understanding supports the algorithm for division with decimal divisors and will be used later when we work on converting metric units.

Using textbook p.139, guided practice for dividing decimals by decimals was given for problems 2, 4 and 6. Students then worked independently on completing remaining questions 2-30 (even only). Problems that were not finished were to be finished for homework.

2013.09.04_activating_multiplying_and_dividing_decimals_by_10_100_1000.pptx | |

File Size: | 233 kb |

File Type: | pptx |

__Accessing the online gradebook__1) Go to the website: my.hrw.com

2) Username and password: youthmath

3) Click on link to "Course 1 - online textbook" - beside the red book

4) Click on tab "Book Pages"

5) Type in the page number in the window next to "Page: " and press "Go!"

***Notice that once you go to that page, you can move between pages using the "previous" and "next" arrows at the top. Go to a "previous" page to see examples from the textbook or go to a "next" page to preview other concepts.

## Thursday, September 5, 2013 - Applying Decimals

**Students were given the cost of a Schoenhut acoustic guitar and the current discount. They were asked to find the discount, new price, sales tax, and final price of the guitar after the discount. Afterwards, students used the information to find the fraction of the discounted price to the whole - original price. Then, students used percent of a number to find the new discounted price through one step instead of two. We added one more component today - how to find the final price (cost plus tax) in one step instead of two. The steps we took are shown below.**

__Bellwork__

**Students were given the solutions for textbook page 139, problems 2-30 (even only). This assignment was worked on during class on Wednesday and was to be finished for homework. Today, students corrected problems they missed. I conferenced with each student after he or she finished correcting their work. Those who did not finish were to finish making corrections for homework. This assignment was graded for accuracy, which falls into the Progress category (30%). Students who finished early began working on Activity 27, which is homework for next week.**

__Classwork__

## Friday, September 6, 2013 - Applying the Algorithms for Adding, Subtracting and Multiplying Decimals

**Students were instructed to put their bellwork for the week in chronological order to be stapled. They should have 4 items from Tuesday, 9/3 - discount, new price, sales tax, and final price for the magic set. They should have 7 items from Wednesday, 9/4 - discount, new price, sales tax, final price, fraction of a whole, decimal form, and percent of a number for the crystals and gems mining kit. They should also have 7 items from Thursday, 9/5, for the Schoenhut guitar. Bellwork could be used to assist the student on the Sales Tax and Discounts Quiz and was turned in with the quiz.**

__Bellwork__

Textbook p.139, problems 2-30 (even only), was collected from those who did not turn in their work at the end of class on Thursday.

**Students took the Sales Tax and Discounts Quiz to demonstrate their understanding of using a discount and applying Georgia's sales tax. Some classes had additional time to work on problem solving with decimals in groups.**

__Classwork__