Dec 09

Dr. Olsen’s office hours for final exam week:

Office Hours for final exam week: Monday 8:30-10am; Tuesday 11am – 1pm; Wednesday 8:30-10am. Thursday and Friday by appointment.

Oct 22

Extra Tutoring for Math 260 this week

Extra Tutoring for Math 260
Will be Available
Wednesday, October 23, 2019
12:00pm – 12:30pm
Friday, October 25, 2019
12:00pm – 1:30pm

Oct 01

Important Announcements:

Dr. Olsen will be out of town at a conference the week of Oct. 7-11.

  1. Class will not meet the week of Oct. 7-11. (Fri., Oct 11, is fall break.)
  2. One class meeting will be cancelled the week of Oct. 7-11.
  3. As a substitute for the other class meeting, we will have 3 videos: a percent video and two mental math strategy videos. Please watch: video 1, video 2, video 3. Please do the (pink) mental math sheets. The pink sheets will be passed out before I leave town.
  4. Homework that might normally be due Friday, Oct. 11, will be due Monday, Oct. 14, due to the Fall Break. Due Oct. 14: section 7.3.
  5. On Monday, Oct. 14, we will answer questions on 7.4.
  6. There will be no not POW’s distributed and no POW presentations the week of Oct. 7-11.

Aug 23

America Reads Volunteer Opportunity

Here are two documents (brochure and application form) detailing a very good volunteer opportunity for teacher education majors. Tutors currently work at Lincoln Elementary school from 2:15 pm – 3:45 pm and at an after-school program at The Crossing from 3:45 pm – 4:45 pm. 

If you have questions, ask in the WIU Reading Center in Horrabin Hall, Room 46.

Jul 15

Welcome – Fall 2019

I look forward to working with you in this course.

Dr. Olsen

Welcome to Math 260!

  1. This website is 1 of 3 websites we use for Math 260. This page has links and SBA Objectives and the SBA Schedule of SBA Quizzes and course announcements.
  2. WesternOnline (WO) – used for the Mastery Quizzes (later in the course)
  3. MyMathLab (MML) – used for online homework practice and online homework for a grade. Please access MML by using WO.  Technical support from MML (Pearson) is 800-677-6337.

Aug 30

Tutoring/Help for Math 260

In the Math Resource Office (MRO – Morgan 209) you can get tutoring and help with Math 260. Hours will be posted in the second week of classes at



Jul 13

Percent Change of the Income Tax Rate in Illinois

In July 2017 the Illinois State Legislature raised the income tax rate from 3.75% to 4.95%.  This change can be described two ways.  “The tax rate increased by 1.2 percentage points.”  or  “The tax rate increased 32%.”

Percent change = change/original = 1.2/3.75 = .32 = 32%

Percent change is the primary way that we (and the media) describe change. When the data itself is a percent, it can be a bit confusing. 

See also:

Jan 23

Pipe Cleaner Number Lines

Pipe Cleaner Number Lines are under PFD Hands On Fraction Activities

Jan 20

Extra Credit Opportunity

As discussed on 1/18/17, you may earn 5 pts of extra credit (to be added to the total of your exam scores). On Monday, 1/23/17, after class those interested will meet in MRO (MG 209) to make some ‘fuzzy stick’ number lines. Dr. O will bring all the supplies. Just show up. If you make a fuzzy stick number line you get 5 pt. You can make a second one, if you wish, to keep.

This is not required.

Nov 18

A couple useful 3D diagrams

Useful diagrams.

Click to open the Word file: 3d-diagrams

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