Breeding African Dwarf Frogs:

Sexing the Frogs: Sexing ADF are easy, provided you have adult frogs. The males will have a pimple like bump on each side next to the arm pit. Females do not have this bump.

Tadpoles require live feeders: African Dwarf Frog Tads are carnivorous, and fish flakes won't cut it for these little guys. You will want to invest in some different types of feeder cultures. Look into getting:
1) Microworms (a non parasitic nematode)
2) Vinegar Eels
3) Grindal Worms
4) White Worms
5) Brine Shrimp
6) Infusoria
ADF tads are really tiny (4mm), so you will need a few different types of small feeders as they grow. You will also need to know how to cultures them, so it's best to get your feeder colonies established first before you breed the frogs. The above live feeders are normally available from some feeder farms, fish breeders (check places that breed Bettas or Discus), and larger fish pet shops.

Taken from http://www.frogforum.net/care-sheet-...warf-frog.html