About Sentence Lab

Sentence Lab is built around active recall — instead of passive multiple-choice exercises, you translate sentences by typing them out completely. This builds stronger neural pathways and prepares you for real-world Spanish use.

We use spaced repetition to optimize your review schedule. Sentences you struggle with appear more frequently, while mastered content spaces out over time. This scientifically-proven method maximizes retention with minimal time investment.

Content is organized into progressive levels that build on each other, starting with basic sentences and advancing through verb tenses, pronouns, and complex grammar structures.

The easiest way to make steady progress: each day Sentence Lab builds you a personalized lesson plan tuned to your level and recent practice. Just open your dashboard and press start — no deciding what to study.

A single lesson weaves together several short activities, so every session covers a balanced mix:

• •Translation: render English sentences into Spanish
• •Vocabulary flashcards: frequency words and themed decks at your level
• •Grammar mini-drills: a rotating focus like ser vs estar or the subjunctive
• •Conjugation practice: quick verb drills
• •Reading: a short, level-appropriate story in longer sessions

Lessons are time-boxed — choose a length from about 5 to 20 minutes and the plan scales to fit. As your accuracy climbs, the level adjusts automatically so the difficulty keeps pace with you.

Content is organized using the Common European Framework of Reference (CEFR) standard:

Graduating to the next level: Complete at least 20 exercises in your current level with 90% accuracy or better. You can always go back and practice earlier levels.

Each practice session presents you with English sentences to translate into Spanish. Type your answer and submit to check if it's correct.

Focus your practice on specific grammar topics with our structured lessons and drills:

• •Targeted Practice: Choose a specific grammar point like ser vs estar, preterite vs imperfect, or subjunctive
• •Progressive Difficulty: Each lesson starts simple and builds to more complex sentences
• •Immediate Feedback: Get explanations for why answers are correct or incorrect

Lessons are a great way to reinforce grammar concepts before practicing them in mixed sessions.

Expand your Spanish with reading content at your level:

• •Reading Stories: Short stories organized by CEFR level, with tap-to-reveal translations and audio narration
• •Current News: Real news adapted to your level and narrated in your chosen voice, refreshed regularly (Premium)
• •Vocabulary Highlights: Key words and phrases are highlighted with translations

Reading authentic content helps you see grammar and vocabulary in real-world context.

Practice real-life conversations from start to finish — meeting someone new, ordering at a restaurant, shopping for clothes, and more.

• •The other speaker's lines are spoken aloud in your chosen voice
• •You build each reply by tapping words into order from a word bank — no blank-page pressure
• •Scenarios span A1 to B2, so they grow with you

Conversation Scenarios are part of Sentence Lab Premium.

Hear natural Spanish throughout the app — on practice sentences, reading stories, scenarios, and news.

• •Accent: choose Latin American or Castilian (Spain)
• •Voice: female or male — four high-quality voices in all
• •Speed: slow the audio down while you're learning a new phrase

Pick your accent and voice in Settings. Where studio audio isn't available, your device's built-in speech fills in so there's always something to listen to.

Sharpen specific skills with quick, replayable games:

• •Verb Blitz: a timed conjugation sprint — pick your tenses and conjugate as many verbs as you can before the clock runs out, then beat your best score
• •Vocabulary Challenge: work your way up through the 2,000 most common Spanish words, from the everyday to the advanced

Build your word bank with flashcard decks you can drill anytime:

• •Frequency decks: the Top 1000 and Next 1000 most common words, ordered so you learn the highest-impact vocabulary first
• •Themed decks: focused sets like Basics, Travel, and Action Verbs
• •Your own decks: add custom vocabulary or import a list via CSV

Study any deck in Flip mode (reveal the answer and self-grade) or Type mode (type the translation and get checked automatically), in either direction — Spanish→English or English→Spanish.

We understand that Spanish has flexible grammar. Our answer checker accounts for:

• ✓Pronoun flexibility: "Como" and "Yo como" are both accepted
• ✓Gender variants: "El profesor" and "La profesora" are both correct when context allows
• ✓Alternative phrasings: Multiple correct translations are accepted
• ✓Accent handling: Configurable in settings — strict, forgiving, or very forgiving

You can adjust how strictly accents are checked in Settings.

Earn points for every exercise you complete! Your score is calculated based on:

• •Sentence length: Longer sentences earn more points
• •Level difficulty: Higher levels have a score multiplier
• •Perfection bonus: 50% bonus for answers with no mistakes (including accents!)

Consistency is key to language learning. Set a daily goal and maintain your streak!

• •Daily Goal: Set your target (5-25 exercises) in Settings
• •Streak: Practice every day to build your streak
• •Reminders: Enable email reminders to help you stay on track

Add your own sentences and vocabulary to practice! This is perfect for:

• •Sentences from your Spanish class or textbook
• •Phrases you encounter in real life
• •Vocabulary lists you want to memorize

Visit My Content to add sentences one by one or import them via CSV.

Customize your learning experience in Settings:

• •Daily Goal: How many exercises you want to complete each day
• •Session Length: Default number of exercises per practice session
• •Typing Strictness: How strictly accents are checked
• •Email Reminders: Daily practice reminders and streak alerts