colleen lewis

@UChB6-Vdv00l5def5Iocwr4A - 4.9K subscribers

I'm an Associate Professor of CS at the University of Illinois Urbana-Champaign. I was previously the McGregor-Girand Associate Professor of CS at Harvey Mudd College. I research equitable and efficient teaching practices and curate CSTeachingTips.org, a NSF-sponsored project for disseminating effective CS teaching practices.

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Testing your code in Jupyter (CS105 at UIUC)

Testing your code in Jupyter (CS105 at UIUC) colleen lewis

1 views - 5 minutes ago

Python Join (CS105 at UIUC)

Python Join (CS105 at UIUC) colleen lewis

3 views - 14 hours ago

String Split in Python (CS105 at UIUC)

String Split in Python (CS105 at UIUC) colleen lewis

3 views - 18 hours ago

String Slicing in Python (CS105 at UIUC)

String Slicing in Python (CS105 at UIUC) colleen lewis

2 views - 19 hours ago

Python string methods and help(str) (CS105 at UIUC)

Python string methods and help(str) (CS105 at UIUC) colleen lewis

4 views - 20 hours ago

Excel COUNTIF (CS105 at UIUC)

Excel COUNTIF (CS105 at UIUC) colleen lewis

11 views - 3 days ago

Excel COUNT function (CS105 at UIUC)

Excel COUNT function (CS105 at UIUC) colleen lewis

17 views - 3 days ago

Diagrams of if, if/else, and if/elif/else (CS105 at UIUC)

Diagrams of if, if/else, and if/elif/else (CS105 at UIUC) colleen lewis

9 views - 5 days ago

Using help() in Python (CS105 at UIUC)

Using help() in Python (CS105 at UIUC) colleen lewis

89 views - 1 week ago

Short hand/Ternary operators in Python (CS105 at UIUC)

Short hand/Ternary operators in Python (CS105 at UIUC) colleen lewis

77 views - 1 week ago

Python's range function (CS105 at UIUC)

Python's range function (CS105 at UIUC) colleen lewis

178 views - 1 week ago

Printing elements in a list using Python's range function (CS105 at UIUC)

Printing elements in a list using Python's range function (CS105 at UIUC) colleen lewis

7 views - 1 week ago

Operators and and or in Python (CS105 at UIUC)

Operators and and or in Python (CS105 at UIUC) colleen lewis

136 views - 1 week ago

break and continue in Python loops (CS105 at UIUC)

break and continue in Python loops (CS105 at UIUC) colleen lewis

133 views - 2 weeks ago

Python while loops (CS105 at UIUC)

Python while loops (CS105 at UIUC) colleen lewis

149 views - 2 weeks ago

Summing pattern in Python for loops (CS105 at UIUC)

Summing pattern in Python for loops (CS105 at UIUC) colleen lewis

191 views - 2 weeks ago

Python for loops - Looping through lists, strings, and dictionaries (CS105 at UIUC)

Python for loops - Looping through lists, strings, and dictionaries (CS105 at UIUC) colleen lewis

208 views - 2 weeks ago

If/elif/else statements in Python (CS105 at UIUC)

If/elif/else statements in Python (CS105 at UIUC) colleen lewis

186 views - 2 weeks ago

Boolean operators in Python (CS105 at UIUC)

Boolean operators in Python (CS105 at UIUC) colleen lewis

195 views - 2 weeks ago

Excel Absolute and Relative Referencing (CS105 at UIUC)

Excel Absolute and Relative Referencing (CS105 at UIUC) colleen lewis

48 views - 2 weeks ago

Modify a List in a Function (CS105 at UIUC)

Modify a List in a Function (CS105 at UIUC) colleen lewis

334 views - 3 weeks ago

Encapsulation using Python Functions (CS105 at UIUC)

Encapsulation using Python Functions (CS105 at UIUC) colleen lewis

174 views - 3 weeks ago

Python Functions that take an Argument (CS105 at UIUC)

Python Functions that take an Argument (CS105 at UIUC) colleen lewis

221 views - 3 weeks ago

Functions that take no arguments (CS105 at UIUC)

Functions that take no arguments (CS105 at UIUC) colleen lewis

221 views - 3 weeks ago

Adding and removing keys from a Python Dictionary (CS105 at UIUC)

Adding and removing keys from a Python Dictionary (CS105 at UIUC) colleen lewis

213 views - 3 weeks ago

Creating Python Dictionaries and Accessing Elements (CS105 at UIUC)

Creating Python Dictionaries and Accessing Elements (CS105 at UIUC) colleen lewis

340 views - 3 weeks ago

Excel functions min, max, sum, and average (CS105 at UIUC)

Excel functions min, max, sum, and average (CS105 at UIUC) colleen lewis

192 views - 3 weeks ago

Removing Items from a Python Set (CS105 at UIUC)

Removing Items from a Python Set (CS105 at UIUC) colleen lewis

173 views - 4 weeks ago

Combining Python Sets (CS105 at UIUC)

Combining Python Sets (CS105 at UIUC) colleen lewis

240 views - 4 weeks ago

Python Set methods add, update, and union (CS105 at UIUC)

Python Set methods add, update, and union (CS105 at UIUC) colleen lewis

228 views - 4 weeks ago

Python sets - no duplicates! (CS105 at UIUC)

Python sets - no duplicates! (CS105 at UIUC) colleen lewis

233 views - 4 weeks ago

Python list methods: append, insert, extend, remove, and pop (CS105 at UIUC)

Python list methods: append, insert, extend, remove, and pop (CS105 at UIUC) colleen lewis

253 views - 4 weeks ago

Accessing and Modifying List Elements (CS105 at UIUC)

Accessing and Modifying List Elements (CS105 at UIUC) colleen lewis

203 views - 4 weeks ago

Introduction to Lists (CS105 at UIUC)

Introduction to Lists (CS105 at UIUC) colleen lewis

260 views - 4 weeks ago

Installing Excel (CS105 at UIUC)

Installing Excel (CS105 at UIUC) colleen lewis

10 views - 4 weeks ago

Casting string variables to numbers in Python (CS105 at UIUC)

Casting string variables to numbers in Python (CS105 at UIUC) colleen lewis

216 views - 4 weeks ago

String functions, methods, and indexing (CS105 at UIUC)

String functions, methods, and indexing (CS105 at UIUC) colleen lewis

253 views - 4 weeks ago

Goals for Lab 01 (CS105 at UIUC)

Goals for Lab 01 (CS105 at UIUC) colleen lewis

88 views - 4 weeks ago

Downloading, renaming, and uploading an Excel File on a Mac (CS105 at UIUC)

Downloading, renaming, and uploading an Excel File on a Mac (CS105 at UIUC) colleen lewis

35 views - 4 weeks ago

How many points is a question in PrairieLearn worth? (CS105 at UIUC)

How many points is a question in PrairieLearn worth? (CS105 at UIUC) colleen lewis

32 views - 4 weeks ago

Debugging Code in PrairieLearn (CS105 at UIUC)

Debugging Code in PrairieLearn (CS105 at UIUC) colleen lewis

82 views - 4 weeks ago

Unicode and the Python ord() and chr() functions (CS105 at UIUC)

Unicode and the Python ord() and chr() functions (CS105 at UIUC) colleen lewis

267 views - 4 weeks ago

Python abs(), import, and the math module (CS105 at UIUC)

Python abs(), import, and the math module (CS105 at UIUC) colleen lewis

288 views - 4 weeks ago

Comments, Expressions, and Statements in Python (CS105 at UIUC)

Comments, Expressions, and Statements in Python (CS105 at UIUC) colleen lewis

340 views - 4 weeks ago

User input in Python (CS105 at UIUC)

User input in Python (CS105 at UIUC) colleen lewis

312 views - 4 weeks ago

Python f-strings (CS105 at UIUC)

Python f-strings (CS105 at UIUC) colleen lewis

307 views - 4 weeks ago

Python operators: //, %, += (CS105 at UIUC)

Python operators: //, %, += (CS105 at UIUC) colleen lewis

322 views - 4 weeks ago

Escape Characters in Python (CS105 at UIUC)

Escape Characters in Python (CS105 at UIUC) colleen lewis

349 views - 4 weeks ago

Equations in Excel (CS105 at UIUC)

Equations in Excel (CS105 at UIUC) colleen lewis

369 views - 4 weeks ago

Print statements in Python (CS105 at UIUC)

Print statements in Python (CS105 at UIUC) colleen lewis

510 views - 4 weeks ago

Intro to variables and types in Python (CS105 at UIUC)

Intro to variables and types in Python (CS105 at UIUC) colleen lewis

304 views - 4 weeks ago

Python Indentation - How to engage with the readings (CS105 at UIUC)

Python Indentation - How to engage with the readings (CS105 at UIUC) colleen lewis

425 views - 4 weeks ago

Why won't my function work? You assigned it a new value!

Why won't my function work? You assigned it a new value! colleen lewis

51 views - 5 months ago

Tracing Method Calls in Java - within the file

Tracing Method Calls in Java - within the file colleen lewis

94 views - 5 months ago

Tracing method calls in Java - Visualizing a call stack

Tracing method calls in Java - Visualizing a call stack colleen lewis

143 views - 5 months ago

Python assignment statements - Reading and writing the value of variables

Python assignment statements - Reading and writing the value of variables colleen lewis

55 views - 5 months ago

CS199-CA: Transparent Grading and Collaboration Policies

CS199-CA: Transparent Grading and Collaboration Policies colleen lewis

578 views - 1 year ago

Experience Report: Physical Models of Java Inheritance

Experience Report: Physical Models of Java Inheritance colleen lewis

141 views - 1 year ago

Java HashSet Chaining Algorithm - 3D Representation

Java HashSet Chaining Algorithm - 3D Representation colleen lewis

389 views - 1 year ago

Java HashSet Open Addressing Algorithm - 3D Representation

Java HashSet Open Addressing Algorithm - 3D Representation colleen lewis

304 views - 1 year ago