I'm trying to cram in a unit on systems of equations and inequalities before break. It's hard, since so many students are still not totally comfortable with graphing linear functions. But we're making progress. We're up to solving 3x3 systems with linear combination, and most of them have got the idea. These problems are huge, and are probably the longest routine problems my students have ever done. This is cool, because it makes them feel smart and accomplished when they get one right. Unfortunately, a single arithmetic or copying error (which happen all the time) can crumble the whole thing, and then the frustration is back again, eating away at their self-confidence. I'd like to get to graphing systems of linear inequalities before break. When we get back, we need to review for the final, but I'd really like to do some work with linear programming problems first. Here are the files from the last few lessons.

Lesson 1 (Linear Functions) / Keynote / Quicktime

Lesson 2 (2x2 Linear Combination) / Keynote / Quicktime

Lesson 3 (2x2 Word Problems) / Keynote / Quicktime

Lesson 4 (3x3 Systems)

Lesson 5 (Systems Practice)

Is a 1×1 matrix a scalar?

4 hours ago

## 2 comments:

I wasn't sure where to leave this comment since it wasn't completely content-specific; I hope this isn't too much of an intrusion.

I just want to share my puzzle website with you, http://www.webkendoku.com. It is a place where you can play online KenKen games.

Also, other math teachers have found it useful with their students.

Thank you for your time and again I hope this was not too much of an intrusion.

Thank you for sharing these plans for Lines and Systems. I am currently working with my 8th grade Algebra students on systems and can always use extra application problems. I love the relay race concept for making solving systems practice more enjoyable for the kids - they love competition! I am a new reader of your blog and it is a wonderful resource. I really appreciate your willingness to share - great to not have to reinvent the wheel!

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