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.NR.4.4

Solve problems involving addition and subtraction of decimal numbers to the hundredths place using a variety of strategies.

Example Problems

Add:

13.53 + 5

Add:

13 + 56.45

Add.

? = 3 + 4.5

Khan Academy Resources

Subtracting decimals Adding decimals Multiplying decimals like 0.847x3.54 (standard algorithm)Dividing decimals: thousandths Adding & subtracting decimals word problems Divide whole numbers to get a decimal Adding decimals: thousandths Dividing decimals: hundredths Subtracting decimals and whole numbers (tenths)Adding decimals and whole numbers (tenths)Adding decimals (hundredths)Estimating with subtracting decimals Add decimals visually Adding decimals and whole numbers (hundredths)Adding decimals (tenths)Decimal multiplication place value Subtract decimals (hundredths)Adding decimals < 1 (hundredths)Subtract decimals < 1 (tenths)Subtracting decimals (tenths)Subtract decimals visually Adding decimals < 1 (tenths)Estimating with adding decimals Subtract decimals and whole numbers (hundredths)Subtract decimals < 1 (hundredths)Subtracting decimals: thousandths Adding & subtracting decimals word problem Dividing by a multi-digit decimal Adding three decimals Subtracting decimals: 9.005 - 3.6 More advanced subtraction strategies with hundredths Subtracting decimals: 10.1-3.93 Subtracting decimals: 9.57-8.09 Estimating decimal subtraction Subtracting decimals: 39.1 - 0.794 Long division with decimals Strategies for subtracting more complex decimals with tenths Decimal multiplication place value Adding decimals with ones, tenths and hundredths Estimating decimal addition Intro to multiplying decimals Dividing a whole number by a decimal Adding decimals word problem Dividing decimals completely Dividing decimals with hundredths Multiplying challenging decimals Adding decimals with hundredths Dividing whole numbers to get a decimal Adding decimals: 0.822+5.65 Dividing a decimal by a whole number Strategies for subtracting basic decimals Introduction to adding decimals: tenths Adding decimals with ones and tenths parts Subtraction strategies with hundredths Adding decimals: 9.087+15.31

1-on-1 AI tutoring aligned to 5.NR.4.4. 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.

Free for teachers, forever →