A prefix is a letter or group of letters added to the beginning of a word to make a new word.

A lot of words in English begin with the prefix ad-, which can mean adding something or moving towards something.

For example:

adverb

Advent (the time leading towards Christmas)

Another common prefix in English is al-, which means 'all' (but only has one 'l').

For example:

almighty

altogether

In this activity, you can practise reading and spelling words that begin with the prefixes ad- and al-.