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.

What grade level is 1.CA.1 taught?

This standard is part of the Grade 1 curriculum in Indiana Academic Standards - Mathematics.

Are there practice problems for 1.CA.1?

Yes, there are 3 practice problems available for 1.CA.1 with worked examples.

What learning resources are available for 1.CA.1?

There are 10 Khan Academy resources available for 1.CA.1, including 4 videos, 6 exercises.

1.CA.1: Demonstrate fluency with addition facts and the corresponding subtraction facts within 20. Use strategies such as counting on; making ten (e.g., 8 + 6 = 8 + 2 + 4 = 10 + 4 = 14); decomposing a number leading to a 10 (e.g., 13 – 4 = 13 – 3 – 1 = 10 – 1 = 9); using the relationship between addition and subtraction (e.g., knowing that 8 + 4 = 12, one knows 12 – 8 = 4); and creating equivalent but easier or known sums (e.g., adding 6 + 7 by creating the known equivalent 6 + 6 + 1 = 12 + 1 = 13). Model the role of 0 and the equal sign in addition and subtraction using objects or drawings. (E)

Demonstrate fluency with addition facts and the corresponding subtraction facts within 20. Use strategies such as counting on; making ten (e.g., 8 + 6 = 8 + 2 + 4 = 10 + 4 = 14); decomposing a number leading to a 10 (e.g., 13 – 4 = 13 – 3 – 1 = 10 – 1 = 9); using the relationship between addition and subtraction (e.g., knowing that 8 + 4 = 12, one knows 12 – 8 = 4); and creating equivalent but easier or known sums (e.g., adding 6 + 7 by creating the known equivalent 6 + 6 + 1 = 12 + 1 = 13). Model the role of 0 and the equal sign in addition and subtraction using objects or drawings. (E)

Example Problems

The distribution of final exam scores in a large statistics course was approximately normal with mean

\mu = 72

points and standard deviation

\sigma = 11

points. Students with scores in the top 15% earned an A.

What is the minimum score to earn an A?
Round to the nearest whole number.

The distribution of weekly commuting distances among employees at a company was approximately normal with mean

μ = 140 \text{ miles}

and standard deviation

σ = 35 \text{ miles}

. Employees in the top 10% of weekly commuting distances receive an additional travel stipend.

What is the minimum weekly commuting distance to receive the stipend?
Round to the nearest mile.

The distribution of battery life for a new set of laptops was approximately normal with mean

\mu = 18.0 \text{ hours}

and standard deviation

\sigma = 3.1 \text{ hours}

. Laptops with battery life in the top 20% receive a "Pro" label.

What is the minimum battery life for a laptop to receive the "Pro" label?
Round to the nearest tenth of an hour.

Khan Academy Resources

Add within 20 Subtract within 20 Subtract within 20 visually Add & subtract within 20 Add within 20 visually Add and subtract within 20 word problems Addition and subtraction word problems: superheroes Adding within 20 using place value blocks Addition and subtraction word problems: gorillas Adding within 20 using ten frames

1-on-1 AI tutoring aligned to 1.CA.1. 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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