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.MD.1

Convert among different-sized standard measurement units within a given measurement system. Use these conversions in solving multi-step, real world problems.

Example Problems

Lily's car has a fuel efficiency of 8 liters per 100 kilometers.

What is the fuel efficiency of Lily's car in kilometers per liter?

Grace's minivan uses 15 liters of fuel for every 120 kilometers.
What is the fuel efficiency of Grace's minivan in kilometers per liter?

Tammy applies 200,000 cubic centimeters of pesticide for every square meter of farmland.
At what rate is Tammy applying pesticide in cubic meters per square meter?

Khan Academy Resources

Metric units of length review (mm, cm, m, & km)US Customary units of length review (in, ft, yd, & mi)Metric units of mass review (g and kg)Metric units of volume review (L and mL)US Customary units of weight review (oz & lb)Converting units of time review (seconds, minutes, & hours)US Customary units of volume review (c, pt, qt, & gal)Convert units word problems (metrics)Convert units (US customary)Convert units of time Convert units (metrics)Convert units word problems (US customary)Convert units multi-step word problems (US customary)Convert units multi-step word problems (metric)Same length in different units Measurement word problem: running laps Measurement word problem: elevator Converting units: US volume Measurement word problem: blood drive U.S. customary and metric units Measurement word problem: distance home Time word problem: Susan's break Converting units: minutes to hours Converting units: metric distance Measurement word problem: tea party Converting units: centimeters to meters

1-on-1 AI tutoring aligned to 5.MD.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.

Free for teachers, forever →