No, you are not receiving this email a day too early:), it is a short week here at Duffield School. On Thursday many of our junior high students enjoyed a wonderful day on the ski hill in Marmot – what a fantastic opportunity for those that enjoy the thrill of the slopes.

A huge thank you is sent out to Mrs. Petterson who did all of the work to organize the day!! Also, to Mrs. Satermo and Mr. Olson who joined the group as supervisors even with the EARLY morning wake up call required. Remember, there is no school tomorrow (Friday, January 30th) as it is a PD Day for staff. As for the highlights, here we go:).

In Grade 7 we spent the week reviewing the order of operations with decimal numbers. We did not spend a lot of time on this as many of us are quite good at this already. Understanding the order of operations is a very important skill for students in order to continue to be successful in mathematics as they will encounter it MANY more times throughout their years. Also, we spent time converting between fractions, decimals, and percents. We took some notes on these processes, which I have uploaded to the blog if you would like to have a look, and then completed some practice questions. To end the week we wrote our quiz on this lesson, as well as began to look at word problems that involve percents. In this lesson students will be asked to calculate percents of a number. For example, what is 15% of 60. To do this students translate the word “of” to mean multiply. We will continue to work on this next week, as well as prepare for our unit 3 exam coming VERY soon.

In Grade 8 we finished our study of the surface area of triangular prisms and moved on to look at the surface area of cylinders. To begin we completed an Investigate Task where we calculated the surface area of an empty glowstick tube. Through this investigation students came to realize a few things. 1. A cylinder has 3 faces – 1 rectangle and 2 congruent circles. 2. The one dimension of the rectangle is equivalent to the circumference of the circles. 3. We only require 2 pieces of information to calculate the surface area – the height (or length depending on orientation) of the cylinder and either the radius or diameter of the circles. Our biggest challenge so far has been to remember the difference between the formula for circumference (pi x diameter OR 2 x pi x radius) and the formula for area (pi x radius squared). We have also begun to create our own formula sheets that we will be permitted to use on all quizzes and exams. Students have been strongly encouraged to take the time to create a personal formula sheet as I will not be providing them with one should they choose not to make their own, as well as to use pictures, words, and symbols to help them. Next week we will finish our study of surface area, write lesson quizzes, and begin to look at volume.

In Grade 9 we spent time this week reviewing how we work with equations as many of us are struggling with the concept of performing inverse operations in order to isolate the variable in the equation. I do think the review time was valuable and some have now got the idea of performing inverse operations to BOTH SIDES of an equation. We also reviewed the following:

1. If we only see an x in an equation it will graph as a vertical line. We will sometimes have to isolate the variable first, then verify our solution through substitution.

2. If we only see a y in an equation it will graph as a horizontal line. Again, we will sometimes have to isolate the variable first, then verify our solution through substitution.

3. If we see an x and a y in an equation it will graph as an oblique line (diagonally). With these equations we find it help to create a table of values, assign our own values for x, and then substitute in to solve for the equivalent y value.

To end the week we began to match equations with lines, and lines with equations. Next week we will begin to interpolate and extrapolate, as well as begin to prepare for our upcoming unit exam.

**Some reminders:**

1. The grade 9 class is selling Little Caesars pizza kits. These orders are due back to the school by February 13th. Please support their efforts to fundraise for their year end trip to Jasper. Thanks:).

2. Next Thursday and Friday are Teachers’ Convention – no school on either of those dates.

3. Interim Report Cards go home on Wednesday of next week. Please review your child’s with them and then sign and return them to the homeroom teacher ASAP.

Until next week:)