Generating Specific Reports

My students use Khan Academy in the summer for extra math practice.  They are awarded bonus for doing quizzes and tests.  I need to see only quizzes and tests completed for each student.  I am not seeing any way to generate a report with only quizzes and tests for each student.  Additionally, when I look at Progress I see a different number of quizzes and tests taken (and it shows each time the student takes the quiz, so I have to find the highest one manually) from what is generated in the HUGE excel report under settings and also different from the grades I see under assignments when I also count those manually.  Is there any way to get a report that is concise and accurate for each student showing only quizzes and tests?  I've been dealing with this for weeks and am about to pull my hair out.