# Learning

**[What’s the International Phonetic Alphabet, and how do I use it?](https://blog.duolingo.com/how-is-the-international-phonetic-alphabet-used/)**  
Jul 23  
[Ari Moline, Ph.D.](https://blog.duolingo.com/author/emily/)

**[Dear Duolingo: Why does Japanese have three writing systems?](https://blog.duolingo.com/japanese-writing-systems/)**  
Jul 21  
[Anthony Chan, M.A.](https://blog.duolingo.com/author/anthony/)

**[11 chess terms every beginner needs to know](https://blog.duolingo.com/beginner-chess-terms/)**  
Jul 16  
[Katherine Wise](https://blog.duolingo.com/author/katherine/)

**[A guide to 3rd grade math topics](https://blog.duolingo.com/3rd-grade-math/)**  
Jul 14  
[Stephanie Yandow](https://blog.duolingo.com/author/stephanie-yandow/)

**[A guide to 4th grade math topics](https://blog.duolingo.com/4th-grade-math/)**  
Jul 14  
[Stephanie Yandow](https://blog.duolingo.com/author/stephanie-yandow/)

**[A guide to 2nd grade math topics](https://blog.duolingo.com/2nd-grade-math/)**  
Jul 14  
[Alex Emond](https://blog.duolingo.com/author/alex-emond/)

**[A guide to 7th grade math topics](https://blog.duolingo.com/7th-grade-math/)**  
Jul 14  
[Stephanie Yandow](https://blog.duolingo.com/author/stephanie-yandow/)

**[A guide to 5th grade math topics](https://blog.duolingo.com/5th-grade-math/)**  
Jul 14  
[Alex Emond](https://blog.duolingo.com/author/alex-emond/)

**[A guide to 8th grade math topics](https://blog.duolingo.com/8th-grade-math/)**  
Jul 14  
[Alex Emond](https://blog.duolingo.com/author/alex-emond/)