• Continue partners (and computers) from Wednesday!

Overview

• Preliminaries.
  • Admin.
  • Upcoming Work.
  • Extra Credit.
  • Questions.
• Quiz.
• Lab.
• Debrief.

Preliminaries

Admin

• Office hours: MTWF 10-11, Tu 1-2.
  • Sign up at http://rebelsky.youcanbook.me.
  • Also feel free to stop by when my door is open.
  • Or to email me for an appointment.
• Tutor hours
  • Sunday, 3-5 p.m.
  • Sunday-Thursday, 7-10 p.m.
• Weekly review sessions:
  • Wednesday at 8pm in the CS Commons with Zacharcy
  • Thursday at 10am in this room with SamR
  • Thursday at 8pm in the CS Commons with Kumar
• Friday PSA.

Upcoming Work:

• Readings for Monday:
  • Design and Color
  • RGB Colors
• Assignment 2 due next Tuesday at 10:30 p.m.
• Lab Writeup: Exercise 2, parts d, e, and f.
  • Send email titled CSC 151 Lab Writeup 4 (Your Names).
  • Do not include the underscores.
  • Send the email to CSC151-02-grader@grinnell.edu.
  • Due before class on Tueday.

Extra Credit

Academic

• CS Table, Tuesday, Noon, White PDR: Facebook's Walled Internet. (Readings available Monday)
• Community Conversations on Race, 7:30 p.m., Tuesday, February 2, Lazier 3rd Floor Lounge

Peer

• Track and Field at Cornell this Saturday.
• Swimming at Macalester this Saturday.

Future

• Track and Field Grinnell Invite February 6.
• Swimming February 6 vs. UN and IAState.

Miscellaneous

• Caucus on Monday night. (Or observe a Caucus on Monday night.)

Questions

Help! I don't understand modulo.

That's okay, we'll just use remainder.

Help! I don't understand remainder.

That's what today's lab is.

What problem will we write up today?

I'll let you know with ten minutes to go.

What do we submit?

Your answer to the given problem.

Why do we have quizzes? Is it just because you are sadistic?

• A self check for students to see if they have learned the appropriate material.
• Strong educational research evidence that students retain the material they do in low-stakes testing situations, in part because it encourages more study/memorization.
• Provides an opportunity to do work by yourself and not just with teams.
• Makes attendance easier.
• Lets Sam know how you are doing.

Do we submit one homework assignment or two?

Just one!

_What if we don't agree on an answer?

Submit both!

Do we submit one lab writeup or two?

One, if you complete it together in class.

One, if you complete it together outside of class.

Two, if you complete it separately outside of class.

Quiz

Ten minutes.

When you are done, flip over your quiz. You may then read on your cell phone or laptop, or just meditate.

When both you and your partner are done, you may begin the lab.

Lab

ZS says: Rational numbers are numbers that can be expressed as the ratio of two integers.

SR says: Assume that all real numbers are rational, even though that assumption seems irrational.

How should we keep track of what we've done?

Write it down in a notebook.

Copy and paste into an email message (to you and your partner).

Copy and paste into the definitions pane. Select what you've pasted. Choose "Comment out with Semicolons" from under the Racket menu.

What is the lab writeup?

Exercise 2 parts d, e, and f.

Send the email to CSC151-02-grader@grinnell.edu.

For d and f, explain the value of bounded-val based on val (and maybe lower and upper).