I have a group of students, say 30. Their group lessons are so that 5 come on tuesday at 15:00 five at 16:00 five on friday at 18:00 etc...

**I need a report on how many lessons i give during a period of, say 10 weeks.**

In this case it would amount to 6 groups of 5 students having a lesson every week i.e.. 6 lessons to teach every week for 10 weeks (->60 lessons).

The above might be enough info but just incase...

Every student record has a day for lesson, hour for lesson.

I made a text calculation field "A" (day for lesson&" "&hour for lesson resulting in for ex. "friday 16:00".

I was able to sub summerize them by this calculation field.

So i end up with a list (sub summary) of all the lessons i have and would like to count the rows of the list and multiply by 10...

What table is your report based, Students or Lessons.

Seem to me if you based in on lessons, did a find for the time frame, then the sub summary report, no body part, you would have your info. Any field that count's ID's would give you a total in the sub summary part, and a grand total in the footer.

That's if I understand you correctly.