group
1 = experimental group
2 = control group

gender
0 = male
1 = female

number of years of "glasbena pripravnica"
0 = not attending
1 = 1 year
2 = 2 years

grade
1 = third grade
2 = fourth grade

parents playing musical instruments
0 = no
1 = yes

parents attending musical school
0 = do not know
1 = no
2 = yes

How much do you like to attend solfeggio class?
1 = do not like at all
2 = do not like
3 = more unlike than like
4 = middle
5 = more like than unlike
6 = like
7 = like very much

Learning independently solfeggio at home - do not learn
0 = unchecked
1 = checked

How much time do you spend on learning solfeggio at home?
0 = do not learn at all
1 = less than 1 hour
2 = 1 to 2 hours
3 = more than 2 hours

Self-assessed level of knowledge of solfeggio
1 = very bad
2 = bad
3 = good
4 = very good
5 = excellent

What do you think about different types of independent learning of solfeggio? - Notation
1 = do not like at all
2 = do not like
3 = neither like nor dislike
4 = like
5 = like very much

How good can you use these devices? - PC
1 = very bad
2 = bad
3 = middle
4 = good
5 = very good

Classroom experience questionnaire - enjoyable
1 = strongly disagree
2 = disagree
3 = neither disagree neither agree
4 = agree
5 = strongly agree

What is your opinion about activities at the class today? - We sang the song we already know.
1 = very boring
2 = boring
3 = middle
4 = interesting
5 = very interesting

Level of knowledge - Tingo Layo 1 or Imam dolino zeleno 1 (pretest)
0 = wrong
1 = correct

Opinion on independent learning of solfeggio - 1 (control group)
1 = not at all
2 = no
3 = neither yes nor no
4 = yes
5 = for sure

Success in singing when using app (experimental group)
1 = Less than 20%
2 = 20-30%
3 = 21-40%
4 = 41-50%
5 = 51-60%
6 = 61-70%
7 = 71-80%
8 = 81-90%
9 = more than 91%

How did you like the use of mySolfeggio?
1 = very difficult
2 = difficult
3 = more difficult than easy
4 = middle
5 = more easy than difficult
6 = easy
7 = very easy

Behavioral parameters when using mobile app mySolfeggio - ease of use
1 = very low
2 = low
3 = neither low nor low
4 = high
5 = very high

Evaluator 1 Evaluation of singing - rythm
1 = very bad
2 = bad
3 = neither bad nor good
4 = good
5 = very good