Hairtail natural spelling is an online English learning and education application specially developed by Beijing Duwo Technology Co., Ltd. for children aged 4- 10 in China. By cultivating the baby's phonological awareness, word understanding, spelling and speculative ability, let the baby "read, listen and write words and learn vocabulary easily" and let the baby fall in love with speaking English. You can study online.

The natural spelling course with fish is based on CEFR (European common language reference standard) and CCSS (American common core state education standard), and the course is divided into four learning levels according to Bloom's cognitive pyramid design. These four levels are:

Level 1 focuses on understanding letters and their pronunciation;

Level2 focuses on the pronunciation of short vowels and consonants;

Level3 focuses on the combination of long vowels and consonants;

Band 4 focuses on learning special and common vowel and consonant letter combinations and spelling rules of letter combinations.