

The kids collected tadpoles from the pond and watched them develop.
[ðə ˈkɪdz kəˈlɛktəd ˈtædˌpoʊlz frəm ðə ˈpɑnd ənd ˈwɑtʃt ˈðɛm dɪˈvɛləp.]
Within a few weeks, the tadpole had grown tiny back legs.
[wɪˈðɪn ə ˈfju ˈwiks, ðə ˈtædˌpoʊl həd ˈɡroʊn ˈtaɪni ˈbæk ˈlɛɡz.]
Have you ever noticed how quickly tadpoles turn into frogs?
[həv ju ˈɛvər ˈnoʊtəst ˈhaʊ ˈkwɪkli ˈtædˌpoʊlz ˈtɜrn ˈɪntə ˈfrɔɡz?]
"tadpole" is in the lesson "Fishes" (Level 14), along with 10 other useful words. LinDuo has 180 topic lessons like this one, 2,375 words in total. Every word has an illustration, a transcription and pronunciation in a female and a male voice. Just 10–15 minutes a day is enough to learn them all. Free, and works offline.