Two letters/sounds that are combined to produce one sound.
The English language has many irregularities in spelling due to its complex history. The word "phonics" comes from the Greek word "phōnē," meaning sound, but its spelling was likely influenced by other factors such as etymology or historical usage.
digraph
Phonics
A digraph is short for directed graph.
Two signs or characters combined to express a single articulated sound; as ea in head, or th in bath.
phonics is very easy
There are quite a few resources online that offer phonics worksheets. Two excellent websites for phonics worksheets are tampareads.com/phonics/phonicsindex.htm and free-phonics-worksheets.com.
The word digraph is a noun. The plural form is digraphs.
Hooked on Phonics was created in 1987.
The antonym for "digraph" is "monograph." While a digraph is a combination of two letters representing a single sound, a monograph is a scholarly piece of writing on a specific subject.
Your son does not need to struggle because there are some great online sources for phonics worksheets. The best website for phonics worksheets is free-phonics-worksheets.com.
When I was in first grade we were learning phonics.