Try using your new language in family devotions. You can read a familiar verse in the language and help your children to memorize it over the course of a week. You and your foreign language student should also take the opportunity to pray in the target language. Find a native speaker and practice pronunciation in real conversation. This will help you with the flow and rhythm of a language, as well as the pronunciation of individual words and sentences.
Good pronunciation comes from listening and repeating good spoken examples.
Whether included in your curriculum or as a supplemental tool, audio recordings of native speakers are a must. Check with your local library and bookstores for audio resources. Even foreign language music tapes will help make your student familiar with the language. As your student listens to the native speakers on tape, have him repeat the words and sentences used. Since he often cannot judge his own pronunciation, be available to compare it to what you hear on the tape.