How to record something and convert it to a different format?

I'm taking an online class and part of it is required for my class to record three assignments. These assignments must be in any of these styles. But i have no idea how to convert them to that. I have an iphone so I can record it using that and I can also download apps from the app store on my laptop, but i need to know how I can convert them to any of these…
.WAV files.MOV files.WMF files.MP3 files.MP4 files

Looks like you need a video converter. I would suggest Freemake Video Converter, Format Factory, or Adapter. All are free, but Freemake is the easiest to figure out.

Most converters work by dragging in the video and selecting what output you want. The defaults setting for each output format works pretty well, so I wouldn't tweak anything when you first start using it.

Freemake:
http://www.freemake.com/free_video_converter/

Format Factory:
http://www.pcfreetime.com/download.html

Adapter:
http://www.macroplant.com/adapter/

There's a converter for any needs you have on this web page:
http://www.dvdvideosoft.com/
I have been using their programs for a while and they work good.