Problem Techniques

Any additions to the indexed snippets below should use the same format. A suggested model is provided in this snippet template.

Index of Problem Coding Techniques

This index links to problem code snippets that quickly show how to accomplish each effect. Each has limited explanation that assumes a basic understanding of how PG files are written. If you want more details, please see the MathObjects documentation, POD documentation, PG macro files, and PG library files.

• MathObjects documentation Written by Davide Cervone
• POD documentation (POD - Plain Old Documentation)
• PG macro files Source code for pg/macros files.
• PG library files Source code for pg/lib files.

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Topics A-B

• Accuracy Required for Numerical Answers
• Adaptive Parameters in Answers
• Adding New Functions to the Context
• Adding Labels, Lines and Points to Dynamic Graphs
• Algebraic Fractions in Student Answers
• Aligned Answer Blanks
• Allowing Strings (Text) in Student Answers
• Answer Blank in the Exponent
• Answer Format Help
• Answer Hints
• Answer is a Solution to an Equation
• Any Answer Marked Correct
• Antiderivatives and Indefinite Integrals
• Applet Example: Flash
• Applet Example: GeoGebra
• Applet Example: Embedding Sage
• Applet Example: Draggable Statements
• Arrows in Dynamic Graphs
• AskSage subroutine for using Sage

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Topics C-D

• Comments (for Instructors) Visible in the Problem Library
• Composition of Functions as Correct Answer
• Compound (Multi-part, sequential) Problems (see also Scaffold)
• Constants in Problems
• Constant Differences (Additive) Between Student and Correct Answers
• Constant Differences Between Student and Correct Answers
• Custom Answer Checkers
• Custom Error Messages
• Draggable Statements
• Difference Quotients as Correct Answers
• Differentiating Formulas
• Digits TolType
• Disabling Functions and Operators in Student Answers
• Domain of Function Evaluation

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Topics E-F

• Equation Answer Evaluation (Implicit)
• Equations Defining Functions (Not Implicit)
• eval() Versus substitute()
• Error Message Customization
• Extracting Coordinates of a Point
• Finding the norm of a Vector
• Factoring and Expanding Polynomials
• Flash Applets (Deprecated. Browsers have stopped supporting Flash.)
• Flash Applet Point and Graph Example (Deprecated. Browsers have stopped supporting Flash.)
• Formatting Correct Answers: Equations
• Formatting Correct Answers: Numbers and Formulas
• Formatting: Decimals
• Formatting Fractions as Student Answers
• Formula Answer Evaluation; Limits for Evaluation
• Formula Answer Evaluation; Test Points
• Formulas with Units, as Answers
• Formulas with Variables Other than x
• Fractions (Algebraic) as Student Answers
• Functions Added to the Context
• Function Answers Up To Additive Constants
• Function Composition as Correct Answer

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Topics G-H

• Graphic Images, Dynamically Generated
• Graphic Images, Dynamic, with Labels, Lines and Points
• Graphic Images, Dynamic, with Filled Regions
• Graphic Images, with Parametric Functions
• Graphic Images, Put Into Tables
• Graphic Images, Static
• Graphic Image, TikZ Images
• Graphing in 2D with Contour Plots
• Graphing in 2D with Contour Plots that Have a Color Gradient
• Graphing in 2D with Slope Fields
• Graphing in 2D with Vector Fields
• Graphing in 3D with Cylindrical Coordinates
• Graphing in 3D with Rectangular Coordinates
• Graphing in 3D with Parametric Curves
• Graphing in 3D with Parametric Surfaces (e.g., Spherical Coordinates)
• Graphing in 3D with Vector Fields
• Graph Tool, a way for students to input graphs as answers
• Hints in Problems
• HTML Links in Problems

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Topics I-J

• Intervals as Answers
• Inequalities as Answers
• JavaScript

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Topics K-L

• Knowls
• Labels on Dynamically Generated Graphs
• Limits over which Formulas are Evaluated
• Lines in Dynamically Generated Graphs
• Linked Answer Blanks
• Linking Successive Problems
• Links to Other Web Pages
• Lists as Answers
• Logarithms

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Topics M-N

• Matching Problems
• Matching Problems That Have Static Graphic Images
• Matching Problems That Have Dynamic Graphic Images
• Month, Day or Year as a problem variable
• Multiple Choice Problems
• Multiple Choice Problems with Graphic Images (see example 1)
• Multiple Select Problems (Select All That Apply or Checkbox Multiple Choice)
• MultiAnswer, Self Referential Problems
• Multi-Part, Sequential Problems
• Named Answer Rules
• Named (Numerical) Constants in Problems
• Numbers with Units, as Answers
• Numerical Answer Evaluation Tolerance
• Numerical Constants in Problems
• Numerical Tolerance in Problems

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Topics O-P

• Parameters (Adaptive) in Answers
• Parametric Equations as Answers
• Parametric Lines as Answers
• Periodic Answers
• Planes or Lines Defined Implicitly
• Plotting Parametric Equations
• Plotting Lines and Points on Dynamically Generated Graphs
• Points in Dynamically Generated Graphs
• Points in Student Answers
• Pop-up Lists
• Pop-up Lists For Many Questions With Common Answers

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Topics Q-R

• Radio Buttons and Multiple Choice Problems
• Recursively Defined Functions
• Re-randomize Problem allow student to choose a different version. Also see Show Me Another.
• Restricting Allowed Functions in Student Answers
• Restricting Allowed Operators in Student Answers
• Restricting Student Answer Formats

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Topics S-T

• Scaffolded (or "sequential", or "compound") problems. Reveal parts consecutively.
• Slope Field Graphs
• Solutions for Students
• Static Graphic Images
• Step Functions in Answers
• Strings in Student Answers
• Tables in Problem Text
• Tables of Graphs
• Test Points for Formula Evaluation
• Text in Student Answers
• Textbook Specific Messages
• Tolerance in Numerical Answers
• Trig Functions in Degrees

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Topics U-Z

• Units in Problem Answers
• Variables Other Than x in Formulas
• Vectors in Problems
• Vector Parametric Lines as Answers
• Vector Valued Functions as Answers
• Vector Field Graphs
• Weighted Answer Graders

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