if I get straight 'A's this semester : si je n'obtiens que des 'A' ce semestre
Note : In France, marks are expressed in figures out of 20 (e.g. the equivalent of an A would be, say, 16 +), not in the form of letters, but someone from France who is familiar with your system would understand what you mean.
Well it depends, Jean-Michel : at école primaire you can get marks out of 10, or even A-B-C-D-E... or at least, it was so in the 80's !
No S indeed. A "straight-A student", hum, does it really exist in France ??
It could be un élève brillant... le premier de la classe... un petit génie, une grosse tête, un champion... le chouchou de la maîtresse (the teacher's pet)
Maybe the natives have something. They don't really understand the idea of a GPA in the French system, though. It's all based on test grades, particularly the baccalaureat for university admissions. Once you pass that (assuming you do pass it, I think it's around 70% now), you're allowed admissions into any French university that you want to go to. There's a different class of school, called les grandes écoles or les écoles nationales, which have stricter entrance policies, and I'm not certain what all of those requirements are. I have heard that preparatory schools are fairly common for those.
You're right Chad, I had to look for the definition of "GPA" ! (for the record : here)
Your understanding of the French system seems accurate. To enter grandes écoles you might need a certain mention at the baccalauréat : mention "assez bien" (>12/20), "bien" (>14/20), "très bien" (>16/20) ; and "passable" > 10/20, means you passed
However, from Bongbang's original sentence (my parents promise to buy me a bike), I rather thought the person speaking was a child.
If that is so, I think the most likely to be heard in France in an equivalent situation, would be "si j'ai des bonnes notes", or stronger : "si je n'ai que des bonnes notes" - of course, it's more subjective, since it all depends on what marks the parents judge "good" or "not good"...
PS: mais si, c'est possible d'avoir 20/20 !! (dictée, en 6è )