Канал: colleen lewis

3D Java - Make a reference variable

3D Java - Make a reference variable

3D Java - Make a double

3D Java - Make a double

3D Java - Make a boolean

3D Java - Make a boolean

3D Java - Make 50 int variables

3D Java - Make 50 int variables

3D Java - Make an int

3D Java - Make an int

APCSA - Quicksort Algorithm In-Place vs. Merge Sort (Part 2 of 3)

APCSA - Quicksort Algorithm In-Place vs. Merge Sort (Part 2 of 3)

APCSA - Quicksort Algorithm Performance (Part 3 of 3)

APCSA - Quicksort Algorithm Performance (Part 3 of 3)

APCSA - Quicksort Algorithm (Part 1 of 3)

APCSA - Quicksort Algorithm (Part 1 of 3)

APCSA - Binary Search Algorithm

APCSA - Binary Search Algorithm

APCSA - Sorting Algorithm Comparison

APCSA - Sorting Algorithm Comparison

Java explanations - Overview (https://tinyurl.com/JavaAnchorCode)

Java explanations - Overview (https://tinyurl.com/JavaAnchorCode)

3D Java examples - Overview (https://tinyurl.com/3DJavaResources)

3D Java examples - Overview (https://tinyurl.com/3DJavaResources)

Preview - Unit 2a APCSA - Annotated Anchor Code

Preview - Unit 2a APCSA - Annotated Anchor Code

Preview - Unit 2b APCSA - Annotated Anchor Code

Preview - Unit 2b APCSA - Annotated Anchor Code

Unit 1 - Types: Variables can hold different types

Unit 1 - Types: Variables can hold different types

Preview - Unit 1 APCSA - Annotated Anchor Code

Preview - Unit 1 APCSA - Annotated Anchor Code

Unit 2-String Alias: In an assignment statement, we always copy the value in the variable-Java APCSA

Unit 2-String Alias: In an assignment statement, we always copy the value in the variable-Java APCSA

Unit 2 - Dog Alias: In an assignment statement, we always copy the value in the variable(Java APCSA)

Unit 2 - Dog Alias: In an assignment statement, we always copy the value in the variable(Java APCSA)

Unit 2 - Constructor: Calling a constructor makes a new object (Java APCSA)

Unit 2 - Constructor: Calling a constructor makes a new object (Java APCSA)

Unit 2 - Null: If we don’t give a reference variable a value, it will be null (Java APCSA)

Unit 2 - Null: If we don’t give a reference variable a value, it will be null (Java APCSA)

Unit 2 - Types: Non-primitive variable types always store a reference (Java APCSA)

Unit 2 - Types: Non-primitive variable types always store a reference (Java APCSA)

Unit 2 - Reference: A reference is like a remote control that keeps track of the object (Java APCSA)

Unit 2 - Reference: A reference is like a remote control that keeps track of the object (Java APCSA)

Unit 1 - Casting: We convert/cast btwn types int/double by putting the new type in parentheses-APCSA

Unit 1 - Casting: We convert/cast btwn types int/double by putting the new type in parentheses-APCSA

Teaching Java Inheritance with Physical Models

Teaching Java Inheritance with Physical Models

CS199-CA Steps for Helping Students

CS199-CA Steps for Helping Students

Java for loop - Flow chart

Java for loop - Flow chart

Java while loops - Flow chart

Java while loops - Flow chart

Java For Loop and While Loop Flow Charts

Java For Loop and While Loop Flow Charts

Part 10: Casting (Java Inheritance)

Part 10: Casting (Java Inheritance)

Part 9: Compilation Rules for Methods (Java Inheritance)

Part 9: Compilation Rules for Methods (Java Inheritance)

Part 8: Motivation for Polymorphism (Java Inheritance)

Part 8: Motivation for Polymorphism (Java Inheritance)

Part 7: Method Calls with Polymorphism (Java Inheritance)

Part 7: Method Calls with Polymorphism (Java Inheritance)

Part 6: Polymorphism Introduction (Java Inheritance)

Part 6: Polymorphism Introduction (Java Inheritance)

Part 5: Inheriting a Grandparent's Method (Java Inheritance)

Part 5: Inheriting a Grandparent's Method (Java Inheritance)

Part 4: Method Execution with Inheritance (Java Inheritance)

Part 4: Method Execution with Inheritance (Java Inheritance)

Part 3: Syntax to Extend a Class (Java Inheritance)

Part 3: Syntax to Extend a Class (Java Inheritance)

Part 2: Method Execution - No Inheritance (Java Inheritance)

Part 2: Method Execution - No Inheritance (Java Inheritance)

Part 1: Variable Type vs Object Type (Java Inheritance)

Part 1: Variable Type vs Object Type (Java Inheritance)

Java Inheritance: Introduction

Java Inheritance: Introduction

5 reasons 3D Java models help students learn

5 reasons 3D Java models help students learn

Java NM: Example 11: An object contains the values of each of the instance variables in the class

Java NM: Example 11: An object contains the values of each of the instance variables in the class

Java NM - Example 10: The variable this is created when we call a method on an object

Java NM - Example 10: The variable this is created when we call a method on an object

Java NM - Example 5: Two variables can reference the same int array and both of them can modify it

Java NM - Example 5: Two variables can reference the same int array and both of them can modify it

Java NM - Example 9: Two variables can reference the same object and both of them can modify it

Java NM - Example 9: Two variables can reference the same object and both of them can modify it

Java NM - Example 8: Reference that isn't set is a null reference

Java NM - Example 8: Reference that isn't set is a null reference

Java NM - Example 7: Calling a constructor makes an object

Java NM - Example 7: Calling a constructor makes an object

Java NM: Example 6: An array passed to a method can be modified within that method

Java NM: Example 6: An array passed to a method can be modified within that method

Java NM - Example 4: Null reference

Java NM - Example 4: Null reference

Java NM - Example 3: A variable can hold a reference to an int array.

Java NM - Example 3: A variable can hold a reference to an int array.

Java NM - Example 2:Calling a method with an argument is another way to assign a value to a variable

Java NM - Example 2:Calling a method with an argument is another way to assign a value to a variable

Java NM - Example 1: Two int variables are independent and do not become linked

Java NM - Example 1: Two int variables are independent and do not become linked

Writing a BPC Plan for your NSF Proposal

Writing a BPC Plan for your NSF Proposal

CS Awesome 3.7 - Two Equivalent Strings in Java (they are not ==)

CS Awesome 3.7 - Two Equivalent Strings in Java (they are not ==)

CS Awesome 3.7 Null String reference in Java

CS Awesome 3.7 Null String reference in Java

CS Awesome: 3.7 - == and .equals with Strings in Java

CS Awesome: 3.7 - == and .equals with Strings in Java

CS Awesome 4.2 - While Loops vs For Loops in Java

CS Awesome 4.2 - While Loops vs For Loops in Java

CS Awesome 4.1 - Introduction to While Loops in Java

CS Awesome 4.1 - Introduction to While Loops in Java

Java HashSet - How does HashSet use hashCode and equals?

Java HashSet - How does HashSet use hashCode and equals?

Introduction to BPCnet.org

Introduction to BPCnet.org

Teaching Practices Game: How to Host

Teaching Practices Game: How to Host

Teaching Practices Game: Introduction

Teaching Practices Game: Introduction

Writing a BPC Plan for Your NSF Proposal

Writing a BPC Plan for Your NSF Proposal

CS Awesome: Null object references

CS Awesome: Null object references

CS Awesome: 3.1 Equal Equal (==) with ints and objects

CS Awesome: 3.1 Equal Equal (==) with ints and objects

CS Awesome: Two variables reference the same object

CS Awesome: Two variables reference the same object

CS Awesome: Vocabulary (Class, Object/Instance, Attributes/Instance Variables, Behavior/Methods)

CS Awesome: Vocabulary (Class, Object/Instance, Attributes/Instance Variables, Behavior/Methods)

Break Through Tech: Resources for Impactful Broadening Participation in Computing (BPC) Plans

Break Through Tech: Resources for Impactful Broadening Participation in Computing (BPC) Plans

CS Awesome 2.1: Working with Turtle Objects

CS Awesome 2.1: Working with Turtle Objects

CS Awesome: 2.1 - Every Java object has their own copy of the attributes/instance variables

CS Awesome: 2.1 - Every Java object has their own copy of the attributes/instance variables

CS Awesome: 2.1 Introducing Java Vocabulary (Class, Object, Methods, Instance Variables)

CS Awesome: 2.1 Introducing Java Vocabulary (Class, Object, Methods, Instance Variables)

CS Awesome: 2.1 Introducing Vocabulary (Class, Object/Instance, Attributes/Instance Variables)

CS Awesome: 2.1 Introducing Vocabulary (Class, Object/Instance, Attributes/Instance Variables)

CS Awesome: 2.1.1 (show program counter)

CS Awesome: 2.1.1 (show program counter)

CS Awesome 2.1.1 (no program counter)

CS Awesome 2.1.1 (no program counter)

Writing a BPC Plan for Your NSF Proposal

Writing a BPC Plan for Your NSF Proposal

Introduction to Sets and Iterators in Java

Introduction to Sets and Iterators in Java

Search within a Graph and BFS in Spampede

Search within a Graph and BFS in Spampede

Depth First Search (DFS) and Breadth First Search (BFS) with a BST

Depth First Search (DFS) and Breadth First Search (BFS) with a BST

BST Algorithm practice

BST Algorithm practice

Stacks and Queues + Interface and BigO practice

Stacks and Queues + Interface and BigO practice

Spampede Design - Inheritance and Interfaces - cycle() and keyPressed()

Spampede Design - Inheritance and Interfaces - cycle() and keyPressed()

Spampede Design - Model View Controller (MVC)

Spampede Design - Model View Controller (MVC)

The Cambridge Handbook of Computing Education Research: A video summary

The Cambridge Handbook of Computing Education Research: A video summary

Spring 2020 - Prospective HMC CS majors from CMC, Pitzer, and Scripps (DRAFT)

Spring 2020 - Prospective HMC CS majors from CMC, Pitzer, and Scripps (DRAFT)

Inheritance vs. Containment: Drawing UML diagrams for Java classes

Inheritance vs. Containment: Drawing UML diagrams for Java classes

Spampede Design - Spampede Board

Spampede Design - Spampede Board

Spampede Demo

Spampede Demo

Teaching Practices Game: Interactive Resources for Training Teaching Assistants - SIGCSE 2020

Teaching Practices Game: Interactive Resources for Training Teaching Assistants - SIGCSE 2020

Introduction to drawing in Spampede

Introduction to drawing in Spampede

Downloading and Importing Spampede to Eclipse

Downloading and Importing Spampede to Eclipse

Using Java enum to create a finite set of objects of a type

Using Java enum to create a finite set of objects of a type

Code with a Recurrence Relationship of T(1)=1 T(N) = N + 2*T(N/2)

Code with a Recurrence Relationship of T(1)=1 T(N) = N + 2*T(N/2)

Code with a Recurrence Relationship of T(1)=1 T(N) = 1 + T(N/2)

Code with a Recurrence Relationship of T(1)=1 T(N) = 1 + T(N/2)

Recurrence Relationship Unrolling T(1)=1 T(N) = N + 2*T(N/2)

Recurrence Relationship Unrolling T(1)=1 T(N) = N + 2*T(N/2)

Recurrence Relationship Unrolling T(1)=1 T(N) = 1 + T(N/2)

Recurrence Relationship Unrolling T(1)=1 T(N) = 1 + T(N/2)

Loop Counting Example 1 - O(logN)

Loop Counting Example 1 - O(logN)

Loop Counting Example 2 - O(logN)

Loop Counting Example 2 - O(logN)

Insert into a BST in Racket and Java

Insert into a BST in Racket and Java

Helper method to wrap the behavior of compareTo

Helper method to wrap the behavior of compareTo

Implementing the Java Map Interface in our Binary Search Tree class

Implementing the Java Map Interface in our Binary Search Tree class

Writing nodeCount/size for a BST in Java and Racket

Writing nodeCount/size for a BST in Java and Racket

Writing Height for a BST in Java

Writing Height for a BST in Java

Designing a BST in Java

Designing a BST in Java

Integer objects in Java vs. int

Integer objects in Java vs. int

Balanced BSTs have a height of log2(N)

Balanced BSTs have a height of log2(N)

Writing Insert for a BST in Racket

Writing Insert for a BST in Racket

Writing Height for a BST in Racket

Writing Height for a BST in Racket

Representing BSTs in Racket

Representing BSTs in Racket

Binary Search Trees (BSTs) Vocab Review and Algorithm Practice

Binary Search Trees (BSTs) Vocab Review and Algorithm Practice

Binary Search Trees (BSTs) - Find, Insert, and Remove Pseudocode

Binary Search Trees (BSTs) - Find, Insert, and Remove Pseudocode

Binary Search Tree (BST) Intro and Vocab

Binary Search Tree (BST) Intro and Vocab

Racket Practice + Intro to Maps (associating keys and values)

Racket Practice + Intro to Maps (associating keys and values)

SIGCSE 2020: Researching Race in Computer Science Education: Demystifying Key Vocabulary and Methods

SIGCSE 2020: Researching Race in Computer Science Education: Demystifying Key Vocabulary and Methods

Practice drawing memory diagrams for Java code with objects and arrays

Practice drawing memory diagrams for Java code with objects and arrays

Practice reading Java code to identify a method signature

Practice reading Java code to identify a method signature

Practice writing a Java Class from a main method and a memory diagram

Practice writing a Java Class from a main method and a memory diagram

Exceptions in Java List/List Node class

Exceptions in Java List/List Node class

Equals vs. == in Java

Equals vs. == in Java

Merge and MergeSort written in Racket

Merge and MergeSort written in Racket

Hint for writing Reverse for List/Listnode in-place (i.e., without creating new ListNode objects)

Hint for writing Reverse for List/Listnode in-place (i.e., without creating new ListNode objects)

toString method for List/ListNode Java class

toString method for List/ListNode Java class

Walking through each ListNode in a List to calculate length

Walking through each ListNode in a List to calculate length

Racket Lists vs Java List/ListNodes

Racket Lists vs Java List/ListNodes

Writing addToFront for List/ListNode Java classes and debugging

Writing addToFront for List/ListNode Java classes and debugging

Creating empty Lists using List/ListNode classes

Creating empty Lists using List/ListNode classes

Using Java Generics in List/ListNode and writing constructors that call other constructors

Using Java Generics in List/ListNode and writing constructors that call other constructors

Java Memory Models for List/ListNode

Java Memory Models for List/ListNode

List/ListNode - Converting Memory Models into Java Classes

List/ListNode - Converting Memory Models into Java Classes

Generics in Java

Generics in Java

Calling another constructor from a constructor in Java

Calling another constructor from a constructor in Java

Interfaces in Java

Interfaces in Java

Abstract Classes in Java

Abstract Classes in Java

Java - super

Java - super

Some ABCs of Teaching

Some ABCs of Teaching

Researching CS Education to Drive Equity and Effectiveness - Colleen Lewis

Researching CS Education to Drive Equity and Effectiveness - Colleen Lewis

Java Strings can't be modified - just like Lists and Strings in Racket!

Java Strings can't be modified - just like Lists and Strings in Racket!

Sort in Racket

Sort in Racket

Racket: foldr and foldl + Recurrence Relationships Practice!

Racket: foldr and foldl + Recurrence Relationships Practice!

Sum of 1+2+4+...+N/2+N is 2N - 1

Sum of 1+2+4+...+N/2+N is 2N - 1

Sum of 1+2+3+4+...+N-1+N is N(N+1)/2

Sum of 1+2+3+4+...+N-1+N is N(N+1)/2

Loop Counting O(N^2)

Loop Counting O(N^2)

Loop Counting O(N+M)

Loop Counting O(N+M)

Loop Counting O(2^N)

Loop Counting O(2^N)

Loop Counting - O(N)

Loop Counting - O(N)

Recurrence Relationships

Recurrence Relationships

Java Arrays 3: int array variable that is not set - it stays null

Java Arrays 3: int array variable that is not set - it stays null

Java Arrays 2: Two ways of creating an int array

Java Arrays 2: Two ways of creating an int array

Java Arrays 1: Set the values in an int array

Java Arrays 1: Set the values in an int array

Java Arrays 4: Modify an int array referenced by two variables

Java Arrays 4: Modify an int array referenced by two variables

Java Arrays 5: Resetting an int array reference

Java Arrays 5: Resetting an int array reference

Java Objects 10: Checking if two objects are == (in an if-statement)

Java Objects 10: Checking if two objects are == (in an if-statement)

Java Objects 9: Checking if two objects are == (result is false)

Java Objects 9: Checking if two objects are == (result is false)

Java Objects 8: Checking if two objects are == (in an if-statement)

Java Objects 8: Checking if two objects are == (in an if-statement)

Java Objects 7: Checking if two objects are == (equal-equal)

Java Objects 7: Checking if two objects are == (equal-equal)

Java Objects 4: Resetting a variable three times

Java Objects 4: Resetting a variable three times

Java Modulo 2: Mod calculates the remainder (example #2)

Java Modulo 2: Mod calculates the remainder (example #2)

Java Modulo 1: Modulo calculates the remainder

Java Modulo 1: Modulo calculates the remainder

Java Division 1: Java integer division discards the remainder

Java Division 1: Java integer division discards the remainder

Java Booleans 5: Equal-Equal (result is false)

Java Booleans 5: Equal-Equal (result is false)

Java Booleans 7: Not-Equal with ints (result is false)

Java Booleans 7: Not-Equal with ints (result is false)

Java Booleans 6: Not-Equal with ints (result is true)

Java Booleans 6: Not-Equal with ints (result is true)

Java Booleans 4: Equal-Equal with ints (result is true)

Java Booleans 4: Equal-Equal with ints (result is true)

Java Booleans 3: Or statement (result is true)

Java Booleans 3: Or statement (result is true)

Java Booleans 2: And statement (result is false)

Java Booleans 2: And statement (result is false)

Java Booleans 1: Creating two boolean variables

Java Booleans 1: Creating two boolean variables

Java Objects 5: Two references to the same Object

Java Objects 5: Two references to the same Object

Java Objects 6: Resetting a variable that references an Object

Java Objects 6: Resetting a variable that references an Object

Java Objects 2: Creating three objects

Java Objects 2: Creating three objects

Java Objects 1: Calling a constructor

Java Objects 1: Calling a constructor

Java Objects 3: A null reference

Java Objects 3: A null reference

Java ints 1: ints get a default value of 0

Java ints 1: ints get a default value of 0

Java ints 4: Resetting the value of two ints

Java ints 4: Resetting the value of two ints

Java ints 3: Resetting the value of an int

Java ints 3: Resetting the value of an int

Java ints 2: Making a copy of an int

Java ints 2: Making a copy of an int

Java ints 5: Looking up values of ints for addition statement

Java ints 5: Looking up values of ints for addition statement

Tips for Department Inclusivity: CSTeachingTips.org

Tips for Department Inclusivity: CSTeachingTips.org

Java Arrays: 2D int arrays

Java Arrays: 2D int arrays

Java Strings: Default values for String variables and String arrays

Java Strings: Default values for String variables and String arrays

Java Arrays: Default values for variables that can hold an int or hold a String

Java Arrays: Default values for variables that can hold an int or hold a String

For Loops and While Loops in Java

For Loops and While Loops in Java

Java Methods 1: Passing a reference to an array

Java Methods 1: Passing a reference to an array

Java Memory Models: Passing an int to a method

Java Memory Models: Passing an int to a method

Interrupting Bias and Creating Institutional Change - Talk at UC Berkeley

Interrupting Bias and Creating Institutional Change - Talk at UC Berkeley

Racket: Trace

Racket: Trace

CS60-specific - Introduction to using Eclipse

CS60-specific - Introduction to using Eclipse

CS60 - Tail recursive Fibonacci

CS60 - Tail recursive Fibonacci

CS60 - Tail Recursion vs. Embedded Recursion

CS60 - Tail Recursion vs. Embedded Recursion

CS60 - Human Checks of Recursive Code

CS60 - Human Checks of Recursive Code

CS60 - Conditionals in Java

CS60 - Conditionals in Java

CS60 - Running JUnit Tests in Eclipse

CS60 - Running JUnit Tests in Eclipse

Back-pocket code: Basic Java class

Back-pocket code: Basic Java class

Back-pocket code: Filter a List (Racket)

Back-pocket code: Filter a List (Racket)

Back-pocket code: For Each List Element (Racket)

Back-pocket code: For Each List Element (Racket)

Back-pocket code: Filter an ArrayList (Java)

Back-pocket code: Filter an ArrayList (Java)

Back-pocket code: For Each Array Element (Java)

Back-pocket code: For Each Array Element (Java)

Back-pocket code: Array Access (Java)

Back-pocket code: Array Access (Java)

Tips for Assessing Programming: CSTeachingTips.org

Tips for Assessing Programming: CSTeachingTips.org

Tips for Teaching Scratch: CSTeachingTips.org

Tips for Teaching Scratch: CSTeachingTips.org

Tips for High School Student Recruitment: CSTeachingTips.org

Tips for High School Student Recruitment: CSTeachingTips.org

Tips for Reducing Bias: CSTeachingTips.org

Tips for Reducing Bias: CSTeachingTips.org

Tips for Lecturing: CSTeachingTips.org

Tips for Lecturing: CSTeachingTips.org