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.

2.NR.2.4

Fluently add and subtract within 100 using strategies based on place value, properties of operations, and/or the relationship between addition and subtraction.

Khan Academy Resources

Subtract within 100 using place value blocks Add within 20 Add within 100 using place value blocks Subtract within 20 Subtract within 20 visually Add and subtract on the number line word problems Add within 100 using a number line Add & subtract within 20 Subtraction word problems within 100 Subtract within 1,000 using place value blocks Subtract on a number line Add within 20 visually 2-step subtraction word problems within 100 Find the missing number (add and subtract within 100)Subtract 10s and 100s (no regrouping)Estimate to add multi-digit whole numbers Adding up to four 2-digit numbers Add on a number line 2-step addition word problems within 100 Add within 1,000 using place value blocks Add using groups of 10 and 100 Select strategies for adding within 100 Break apart 3-digit addition problems Break apart 2-digit addition problems Subtract within 100 using a number line Select strategies for adding within 1000 Add 2-digit numbers by making tens Add 10s and 100s (no regrouping)Addition word problems within 100 Adding by making a group of 10 Breaking apart 3-digit addition problems Adding and subtracting on number line word problems Subtracting 3-digit numbers (no regrouping)Adding 10 or 100 Missing numbers in addition and subtraction Adding 1s, 10s, and 100s Addition and subtraction with number lines Adding 2-digit numbers without regrouping Subtraction word problem: basketball Subtracting 1s using place value Adding and subtracting on number line Addition using groups of 10 and 100 Adding two digit numbers on a number line Subtracting a 1-digit number with regrouping Addition word problem: horses Adding within 20 using place value blocks Subtracting 1s, 10s, and 100s Subtracting 10s using place value Multi-step subtraction word problem Understanding place value when adding ones Strategies for adding 2-digit numbers Adding 3-digit numbers (no regrouping)Subtracting two-digit numbers without regrouping Adding with regrouping Understanding place value when adding tens Subtracting 1, 10, or 100 Breaking apart 2-digit addition problems Adding 53+17 by making a group of 10 Multi step addition word problem Subtracting with place value blocks (regrouping)Subtraction word problem: crayons Adding within 20 using ten frames

1-on-1 AI tutoring aligned to 2.NR.2.4. 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 →