The exercise type Strategy is meant for answering open mathematical formulas, just like the Open exercise type. However, in this exercise type, students can decide themselves how many answer fields they want to use. All answer fields are evaluated against the same evaluation mechanism.
This exercise type can be used for exercises where students should be able to provide intermediate steps that are equivalent to the correct solution, as in this example:
Example 1: Strategy type exercises for intermediate steps
Strategy type exercises can also be used when the student should decide themselves on the number of answer fields they want to use. Do note that the definition of the solution and the (positive and negative) feedback is more complex for this type of use. More details on this are provided below.
Example 2: Strategy type exercises for when the student should decide on the number of answer fields
The number of answer fields
The student can add or delete answer fields by clicking on the “+” or “-” symbols.
You can use the “Number of answer fields” dropdown in the General tab of the exercise to prescribe a minimum number of answer fields a student has to use. Note that this evaluation does not automatically check if the contents of the answer fields are different.
In the feedback or the solution, you can add an evaluation that checks the number of answer fields that the student created. This is an example where we check in the negative feedback if at least 3 answer fields were created:
This looks as follows to the student:
Evaluation
All answer fields are evaluated against the solution and feedback definition of Answer field 1. The solution and feedback definition of this field is the same as that in Open type exercises.
The scoring scheme for this exercise is the following:
Students get achieve 50% of the total score by having the correct answer among their answers
The other 50% is calculated as an average of how you score on the rest of your answers
More on Example 2
In Example 2, we want the answers in all answer fields to be different, but all answer fields are checked against the same evaluation mechanism. Because of this, we need to define the solution and the feedback rules with an ‘eval statement’ evaluation type.
An example of what the solution Definition of Example 2 could look like is the following:
More on the evaluation type ‘eval statement’ can be found in the authoring manual. Note that we can also use an Open type exercise for questions like Example 2. Below you see Example exercise 2 but in an Open exercise format: