Rule 1: student can not get negative points for the answer, minimum is 0.
Rule 2: when rounding, Edutizer favors student - number are rounded upwards.

Question with one correct answer (YV): if student answers correctly - 100% pf points is awarded, else 0%.

Question with multiple selects (LT) - each of the selects is scored like a question with one correct answer (see above). Question points are evenly distributed between selects.

Example: 

Complete sentence:

Two rights (-) wrongs (+) do tu-tu-tuuu (-) not (+) make wrong (-) right (+) .

Student is awared 67% (two select were asnswered right, one wrong).

Question with numerical answers (AK): Each part of the select is treated independetly. For each part the given aswer is checked agaist the defined min and max values. If it fits, points are awarded, if not - not.

Example:

Student is awarded 50% of points (one right, one wrong)

Question with multiple correct answers (MV): These are tricky.
The main idea: student should get points for each correct answer marked as correct and be punished for each wrong answer marked as correct.
The formula is following:

Let A = 1 / (number of correct answers), B = 1 / (total number of answers).
Then for each answer marked by student as correct:
If the answer was correct, then
   Points = Points + A, 
else 
   Points = Points - B.

Example:

You have to choose correct answers

correct answer

correct answer

wrong answer

Student is awarded 16% (one correct answer marked as correct gives 0,50 points, one wrong answer marked as correct gives -0,33 points. Numbers are rounded up (rule 2).


Question with free form answers (KK) are not scored automatically, but are makred by a teacher.