Month: February 2013

Graphing Trig Functions Trigonometric Functions

Amplitude and Period

What does this student know? How would you take the kid to the next level?

Thanks to the Ultimate Tina Cardone for her excellent submissions. Her reign of terror over this blog will end soon!

Law of Sines Trigonometric Functions

Law of Sines

Courtesy of Tina Cardone and presented without comment.

Exact Values of Trig Functions Trigonometric Functions

sin(75) = …

What do these responses reveal about what the students know about trig? Or just comment about what you find interesting here.

Thanks to the Incredible Tina Cardone for the submissions.

Pythagorean Theorem

Missing Side of Triangles

Here’s a mistake from a trig class. Would the question be easier in a Geometry class?

Here’s my theory: teachers underestimate how weak most of our students’ knowledge is, and how weakly in transfers. In particular, this problem became twice as difficult as soon as it was offered in the context of a trig class, without carefully writing the right angle in there with the lil’ square.

Am I right? Wrong?

Thanks to the Uncanny Tina Cardone for the submission.

Arc Length

What’s the fastest way to help this kid?

Thanks again to the Estimable Tina Cardone.

Equations of Parallel and Perpendicular Lines Linear, Quadratic, and Exponential Models* slope

Holy cow, there’s a lot to dig into here. Read this post carefully.

Post author By mpershan
Post date February 21, 2013
6 Comments on Holy cow, there’s a lot to dig into here. Read this post carefully.

There’s a ton to comment on here. I doubt you’ll need much in the way of a prompt, but here goes: what mistakes are missing? You grade this test on Sunday; what does Monday’s class look like?

Thanks to Tina Cardone, who is not-so-slowly taking over this blog, for the submission.