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4481 East Avenue
Livermore, CA, 94550

(925) 447-4333

Tri-Valley Church of Christ is a family of Christian believers who live in and around Livermore, California. Come worship God with us.


Part of the mission of the church is to carry the message of Jesus Christ to our community and beyond. Here are some of the missionaries we support prayerfully and financially. 

Dick & Maudine Ady — World English Institute

Dick and Maudine Ady

Dick and Maudine Ady

Dick is founder and director of the World English Institute (WEI). He and Maudine have worked diligently in this ministry since 1989. In addition to providing Bible teaching materials for use by missionaries and individuals, Dick leads several mission campaigns each year to foreign nations.

What is WEI?

World English Institute is God’s evangelistic tool that is available to every church and individual Christian in the world.  Its mission is the mission of Christ. He came “to seek and to save that which was lost” (Luke 19:10). It is the mission that Jesus gave the apostles when he said, “Go into all the world and preach the gospel to every creature” (Mark 16:15).

Become a WEI Teacher

Using your computer/tablet/cell phone, your Internet connection, and WEI’s teaching website, you can teach the Good News to people in all of the world’s 203 nations.

Approximately 6000 people visit the WEI teaching website each month to study the English language because it is free. Each month over 800 of these people register and return the introductory lesson and need to be claimed by a teacher. WEI uses lessons from the Bible to illustrate the accompanying lesson on English grammar. You do not need to be a grammar expert to be a teacher. The grammar lessons are graded automatically.

Sign up to teach at World Institute.

Brad, Ronya and Orian Johnson – Australian Missions

Brad, Ronya and Orian Johnson

Brad, Ronya and Orian Johnson

Brad and Ronya Johnson, along with their son Orian, have been working in the Brisbane area since 2001. Presently their work consists of three parts: ministry to the suburban Cleveland Church of Christ; Brisbane Inner City Ministry at West End Church of Christ where food and clothing is often distributed along with Bible lessons; and Australian Indigenous Ministries, a seasonal outreach to share the gospel with indigenous communities. Other events include the women’s Bible classes and retreats organized by Ronya, Camp Connect, and various mission trips and forums.

Their mission; “To live in joyful freedom as we use our God-given gifts to love and serve our Lord and our fellow man with our whole hearts and in every place He leads us.”

For the latest news on the Johnsons visit their monthly blog at