This lesson pack has everything you need to teach High Frequency Word /go/ and includes teaching tips and supplementary practice activity ideas.
 
The word /go/ is a high frequeny word that should be learned but is usually taught before a child is explicitly taught the long vowel /o/ sound.  I like to teach this word right after the sight words /to/ and /do/ have been taught for two reasons:  it is spelled similarily (but sounds different) and it is a good opportunity to review the two recent tricky sight words you've just taught ('to' and 'do').  
 
Because the long vowel sounds are new to the child, I approach teaching this word with the same multi-sensory method that I teach sight words.