by studing or listen in class or understand the subject.
getting good grades
If you want to look up your child's grade online, go to your child's school website, go to his/her school and ask them for a password so you can login and look at your child's grade! ---good thing my parents don't know about this though--- :D
study for the next test and get an A+ on it which will raise your grade
You can take a cerent test or get good grades
Of course A plus is a good grade its probably one of the best grades you can get!
They do if they are good and don'y if they are not.
Yes,5th graders can get good grades. All you have to do is work hard and study. Plus, if you remember stuff for tests, hopefully you'll get a good grade. 
NO. if you have good grades along with it
becaz they study a lot and get good grades
Why would you want to fail 5th grade? THAT MAKES NO SENSE!If you do, you won't get in a very good college. No one will want you..Ok here's the solution:Keep looking...It's down there...THE SOLUTION:DON'T.;)
Of course you need to have good grades... as much as possible don't have grades below 85% . That's the standard grade you need to have to be able to get into the military. :)
Graduate from high school with good grades, get very good grades in college so that you can get into a good Dental School.