['I made in A in all of my classes last semester. I have never done that before. I am really happy with myself.', 'Congratulations! That is great, definitely will help your gpa.  Plan on doing the same this semester?', 'You bet. I will continue to work hard. The payoff is well worth it.']
That's the way to do it, you will be thankful you did in the long run!
Last semester I made an A in every class I took. I have never done that before. I worked really hard for that.