Second Language ProjectChinese as a Second Language

CSL learning library

Chinese for real conversations

Practical guides, listening practice and language tools to help you communicate with confidence.

Choose your lesson

Start a conversation, then build on what you know.

Open a lesson below. If the selector does not appear, you can still use every lesson link.

Lesson 1 · Greetings & introductions

First Connections Conversation Lab

Practice greetings and introductions with a character or a partner. Listen to model conversations, explore Mandarin tones, and choose the language help that works for you.

Chinese · Pinyin · Sound clues · English

Open Lesson 1 Lab →

Lesson 2.1 · Make it your own

Friends & Family Workshop

Build on Lesson 2 with sentence challenges, listening puzzles, and guided Ask & Answer conversations. Keep practicing with rotating libraries for greetings, tones, and speaking about friends and family.

Full Lesson 2 booklet coverage · Instructor mode · 163 rotating practice prompts

Open Lesson 2.1 Workshop →

Practice with CSL tools

Find useful phrases, explore sounds and songs, practice listening, and build confidence with numbers and games.

Pronunciation practice

CSL Sound Lab

Explore Pinyin, tones, and how Mandarin sounds are made. Listen closely and build confidence in your pronunciation.

Open Sound Lab →

Numbers in everyday life

CSL Numbers Lab

Build, hear, and use Mandarin numbers. Practice counting, money, measurement, time, and mathematics with the complete learning companion.

Open Numbers Lab →

Listen, discover & play

Number Neighbors

Practice Mandarin numbers in a friendly listening game. Discover patterns and bring the neighborhood together, at home or with your CSL club.

Play Number Neighbors →

Speak, count & play

Lucky 88

Aim for 88 in a Mandarin card game. Say card values, add your running total aloud, and practice useful action phrases as you play.

Play Lucky 88 →

Explore the materials

Mandarin · Nine-month vocabulary

CSL Vocabulary Companion

Explore 421 words and 30 conversation models. Search Chinese, Pinyin or English; listen, repeat, download audio and practice with TonePerfect. Includes printable lists, a pocketbook and optional Cantonese dictionary links.

Four language layers · Four audio modes · Review edition

Explore the vocabulary →

Keep this library bookmarked as more CSL materials become available.