how about something like this? you will have to change the ratio of R9 and R10 to change the gain of the amp (Av=1+(R9/R10) and figure out on your own what transistors you need. this amp is also "fixed zero bias", so it will have some crossover distortion, you can add a couple of forward biased diodes between the bases of the output transistors to add some bias, and adjust some of the other resistor values to lower the distortion. as i said, i'm not going to do your schoolwork for you, but this schematic is a good starting point. i also recommend you study up on how each part of the amplifier functions, because if i were your teacher, i would certainly be asking you questions about it to see if you know what makes it tick. again, you can look at the article i posted earlier to get the basic idea of what goes on in this amplifier. there's no sense (especially with this being an assignment) in throwing together something somebody else has designed without some clue how it works, and why it's designed the way it is. and i will warn you, this circuit is a rough draft i use for teaching amp theory, the design needs several "tweaks" before it is even a prototype, let alone a finished product. there are a couple of "gotchas" in it (such as the lack of output transistor bias) but that's what makes this an instructional design.
and BTW, you will find that the way this circuit works tends to make individual transistor characteristics not very important, so you don't have to worry about choosing devices with the right Hfe. this circuit will function reasonably well (when you get all of the "gotchas" taken care of) with a wide range of choices for transistors.