Is Goblins free for teachers?

Yes. Goblins offers a generous free tier that includes 1 live feedback assignment per week, insights on student mastery and replays, and the ability to upload your own content. The Max plan adds unlimited assignments, superadaptive mode, grade exports, standards growth reports, and SSO/LMS integration, with per-student pricing for schools and districts.

How does Goblins work?

Three simple steps: (1) Share an assignment from thousands of standards-aligned topics using a share code. (2) Students speak and draw their thinking naturally, and Goblins responds with Socratic questioning that sounds just like their teacher. (3) Teachers get real-time formative insights showing what students struggle with and suggestions to inform instruction.

Does Goblins prevent cheating?

Yes. Goblins uses a purpose-trained AI model that evaluates cheating signals in real time. It can detect when students are copying answers, using external tools inappropriately, or not genuinely working through problems. Copy-pasting answers is also blocked.

Can I use my own voice with Goblins?

Yes. Teachers can record their voice and take a selfie to create a custom 3D avatar in about 30 seconds. Students then hear help in their own teacher's voice and see a familiar face, making the experience more personal and effective.

What math levels does Goblins cover?

Goblins covers math from Grade 5 through AP Calculus, including thousands of standards-aligned topics. Teachers can also upload their own content for custom assignments at any level.

Is Goblins FERPA compliant?

Yes. Goblins is FERPA and state compliant. Student data privacy and security are a top priority.

Does Goblins support English Language Learners?

Yes. Goblins supports 30+ languages so teachers don't have to translate every worksheet. It is especially helpful for ELL students who need accessible math instruction in their native language.

5.3.K

Add and subtract positive rational numbers fluently.

Khan Academy Resources

Adding decimals Add fractions with unlike denominators Subtracting fractions with unlike denominators Add and subtract mixed numbers with unlike denominators (no regrouping)Adding & subtracting decimals word problems Add and subtract mixed numbers (no regrouping)Add decimals and whole numbers (thousandths)Subtracting decimals and whole numbers (tenths)Adding decimals and whole numbers (tenths)Multi-digit addition Add and subtract mixed numbers (with regrouping)Add decimals < 1 (thousandths)Multi-digit subtraction Adding decimals (hundredths)Add decimals visually Adding decimals and whole numbers (hundredths)Adding decimals (tenths)Subtract decimals (hundredths)Subtract decimals and whole numbers (thousandths)Adding decimals < 1 (hundredths)Subtract decimals < 1 (tenths)Subtracting decimals (tenths)Solve two-step word problems involving adding and subtracting decimals Add and subtract fractions Adding decimals < 1 (tenths)Subtracting decimals < 1 (thousandths)Add and subtract mixed numbers word problems (like denominators)Add and subtract mixed numbers with unlike denominators (regrouping)Add and subtract fractions word problems Subtract decimals and whole numbers (hundredths)Subtract decimals < 1 (hundredths)Subtracting decimals: thousandths Adding & subtracting decimals word problem Subtracting decimals: 9.005 - 3.6 Adding mixed numbers: 19 3/18 + 18 2/3 Subtracting mixed numbers: 7 6/9 - 3 2/5 Subtracting mixed numbers with like denominators Adding mixed numbers with like denominators More advanced subtraction strategies with hundredths Subtracting decimals: 10.1-3.93 Subtracting decimals: 9.57-8.09 Adding decimals with thousandths Adding fractions word problem: paint Adding fractions with unlike denominators introduction Subtracting mixed numbers with regrouping (unlike denominators)Subtracting decimals: 39.1 - 0.794 Subtracting fractions word problem: tomatoes Strategies for subtracting more complex decimals with tenths Adding decimals with ones, tenths and hundredths Intro to subtracting mixed numbers Subtracting mixed numbers with like denominators Subtracting mixed numbers with regrouping Adding decimals word problem Mixed number addition with regrouping Solving two-step word problems involving adding and subtracting decimals Multi-digit subtraction: 389,002-76,151 Subtracting mixed numbers with like denominators word problem Solving for the missing fraction Adding decimals with hundredths Strategies for subtracting basic decimals Adding decimals and whole numbers (thousandths)Fraction word problem: lizard Introduction to adding decimals: tenths Adding decimals with ones and tenths parts Subtraction strategies with hundredths Subtracting fractions with unlike denominators introduction Adding multi-digit numbers: 48,029+233,930 Adding mixed numbers with regrouping Adding mixed numbers with like denominators Solving two-step word problems with decimals (adding and subtracting)Intro to adding mixed numbers Relate place value to standard algorithm for multi-digit addition Adding and subtracting 3 fractions

1-on-1 AI tutoring aligned to 5.3.K. Instant help for students, real-time insights for teachers.

Used in classrooms by 100,000+ students at Baltimore County, Plano ISD, Deer Valley USD, KIPP, and districts nationwide.

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