
Complete the word with the right diphthong: oi, oy, ou, ow
Free printable Grade 1 English worksheet for "Complete the word with the right diphthong: oi, oy, ou, ow" — practice diphthongs: oi, oy, ou, ow (reading foundations). No-prep, print or assign online.
This worksheet focuses on practicing the diphthongs oi, oy, ou, and ow to enhance early reading skills. Teachers can use it to reinforce phonics instruction and support students in recognizing common vowel combinations. It is ideal for Grade 1 learners working on reading foundations and phonemic decoding.
Learning objectives
- Identify and distinguish the diphthongs oi, oy, ou, and ow in words
- Complete words by filling in the correct diphthong to form meaningful words
- Develop phonemic awareness and decoding skills related to diphthongs
Answer Key

How to use this worksheet
- Click “Download Worksheet” and sign in with Google or email to get the PDF instantly.
- Print at home or in class for Grade 1; it's no-prep, with no extra materials needed.
- Use the included answer key to mark it in seconds.
Frequently asked questions
Is the “Complete the word with the right diphthong: oi, oy, ou, ow” worksheet free?
Yes. “Complete the word with the right diphthong: oi, oy, ou, ow” is a free printable English & Reading worksheet. Sign in with Google or email to download the PDF instantly.
What grade or age is this English & Reading worksheet for?
It's designed for Grade 1 (ages 6–7), covering Diphthongs: oi, oy, ou, ow.
Does it come with an answer key?
Yes — a matching answer key is included so you can grade it in seconds.
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