Carreer gap between 12std and joining college

Question

I have completed my intermediates in March-2000.Due to my family situation i went for an job as an attender in an arts college until 2006 July, Since then with my friend's help i wrote entrance exams and joined B TECH(IT) Engineering course, I joined by august 2006 and complete it by 2010.

After completion i join in an software company and i got experience for 4 years.

Gap period: march 2000 to July 2006 How can i substantiate this Gap?

Thanks in advance.