Braille is a code made up of shapes made from different configurations of raised dots. Braille was developed by Louis Braille in 1824 at the age of 15. He figured out how to use two columns of three dots in different combinations to make the braille shapes that stand for letters, groups of letters, whole words, and punctuation marks.

The configuration of dots in a braille cell.  

⠕ - the letter "o"
⠉⠁⠞ - three shapes stand for three letters "cat"
⠫ - one shape stand for two letters "ed" like in bed ⠃⠫
⠮ - one shape stands for the word "the"

Braille can be used for reading, writing, math including charts and graphs, science, foreign languages, computer programming, and even music notation.

Braille does take up more room then print. One page of print is about two and half pages of braille. As a result, a single text book or chapter book can take up an entire shelf in braille. For these large books, the book is split into volumes. This can make finding a certain page in a textbook more challenging since the student first needs to have the correct volume.

A website with fun games to learn braille:

A website with printable braille puzzles for peers:

A page with a printable pdf braille alphabet chart: here.