Evaluation type: eval polynomial & fb polynomial

The evaluation type eval polynomial can be used to check (multivariate) polynomials. It does not have automated feedback itself, but instead the evaluation type fb polynomial can be used to give automated (positive or negative) feedback on the student’s answer.

Evaluation type: eval polynomial

The Definition field of this evaluation type should have a (multivariate) polynomial.

Example:

When this evaluation type is used in a Solution rule, the evaluation type fb polynomial can be used in positive or negative feedback to give automated feedback on the student’s answer.

Evaluation type: fb polynomial

This evaluation type can only be used in (positive and negative) feedback when a solution rule is defined that uses eval polynomial. The Definition field should contain the name of the desired polynomial form. The possible polynomial forms are:

free
Polynomial can be in any form. Performs no checks in positive or negative feedback.
basic
Performs basic checks on the student’s answer.

Checks when used in positive FB	Checks when used in negative FB
Invalid/missing variables Invalid operations Non-constant exponents Dividing by non-constants Non-integer/negative exponents	Same as in positive feedback

expanded
Polynomial should be in expanded form.

Checks when used in positive FB	Checks when used in negative FB
All `basic` checks Occurrence of non-atoms under exponents, e.g. (xy)^3 Occurrence of multiplication by non-constant non-atoms, e.g. 2(x+1) Occurrence of variables appearing multiple times in multiplication, e.g. x^2yx^3 Occurrence of monomials appearing multiple times, e.g. x+x+x	All `basic` checks Check if degrees match Check if there are superfluous monomials Check if there are monomials missing Check for wrong coefficients

factored_expanded
Polynomial should be in factored form.

Checks when used in positive FB	Checks when used in negative FB
All `basic` checks Check if the polynomial is factorized more than the author’s Solution Definition	All `basic` checks Check if all factors divide the author’s Solution Definition Check if there are factors missing Check if the constant is correct

factored_expanded_count

Checks when used in positive FB	Checks when used in negative FB
All `factored_expanded` checks Check if the number of factors is correct	All `factored_expanded` checks

factored_basic

Checks when used in positive FB	Checks when used in negative FB
All `factored_expanded` checks Performs positive feedback checks of expanded against every factor	All `factored_expanded` checks

factored_basic_count

Checks when used in positive FB	Checks when used in negative FB
All `factored_basic` checks Check if the number of factors is correct	All `factored_basic` checks

Examples of feedback

The solution rule that is used for these examples is:

Example 1 (basic, negative feedback)

Example 2 (expanded, positive feedback)

More on evaluation types

An overview of all evaluation types can be found here (for mathematical answers) and here (for text-based answers). More detail on the different fields of a feedback rule can be found here.