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.

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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.

Missouri: Grade 3 Math Standards

47 standards · 5 domains

DATA AND STATISTICS

3.DS.A.1 Create frequency tables, scaled picture graphs and bar graphs to represent a data set with several categories.
3.DS.A.2 Solve one- and two-step problems using information presented in bar and/or picture graphs.
3.DS.A.3 Create a line plot to represent data.
3.DS.A.4 Use data shown in a line plot to answer questions.

GEOMETRY AND MEASUREMENT

3.GM.A.1 Understand that shapes in different categories may share attributes and that the shared attributes can define a larger category.
3.GM.A.2 Distinguish rhombuses and rectangles as examples of quadrilaterals, and draw examples of quadrilaterals that do not belong to these subcategories.
3.GM.A.3 Partition shapes into parts with equal areas, and express the area of each part as a unit fraction of the whole.
3.GM.B.4 Tell and write time to the nearest minute.
3.GM.B.5 Estimate time intervals in minutes.
3.GM.B.6 Solve problems involving addition and subtraction of minutes.
3.GM.B.7 Measure or estimate length, liquid volume and weight of objects.
3.GM.B.8 Use the four operations to solve problems involving lengths, liquid volumes or weights given in the same units.
3.GM.C.9 Calculate area by using unit squares to cover a plane figure with no gaps or overlaps.
3.GM.C.10 Label area measurements with squared units.
3.GM.C.11 Demonstrate that tiling a rectangle to find the area and multiplying the side lengths result in the same value.
3.GM.C.12 Multiply whole-number side lengths to solve problems involving the area of rectangles.
3.GM.C.13 Find rectangular arrangements that can be formed for a given area.
3.GM.C.14 Decompose a rectangle into smaller rectangles to find the area of the original rectangle.
3.GM.D.15 Solve problems involving perimeters of polygons.
3.GM.D.16 Understand that rectangles can have equal perimeters but different areas, or rectangles can have equal areas but different perimeters.

NUMBER SENSE AND OPERATIONS IN BASE TEN

3.NBT.A.1 Round whole numbers to the nearest 10 or 100.
3.NBT.A.2 Read, write and identify whole numbers within 100,000 using base ten numerals, number names and expanded form.
3.NBT.A.3 Demonstrate fluency with addition and subtraction within 1000.
3.NBT.A.4 Multiply whole numbers by multiples of 10 in the range 10-90.

NUMBER SENSE AND OPERATIONS IN FRACTIONS

3.NF.A.1 Understand a unit fraction as the quantity formed by one part when a whole is partitioned into equal parts.
3.NF.A.2 Understand that when a whole is partitioned equally, a fraction can be used to represent a portion of the whole.
3.NF.A.2a Describe the numerator as representing the number of pieces being considered.
3.NF.A.2b Describe the denominator as the number of pieces that make the whole.
3.NF.A.3 Represent fractions on a number line.
3.NF.A.3a Understand the whole is the interval from 0 to 1.
3.NF.A.3b Understand the whole is partitioned into equal parts.
3.NF.A.3c Understand a fraction represents the endpoint of the length a given number of partitions from 0.
3.NF.A.4 Demonstrate that two fractions are equivalent if they are the same size, or the same point on a number line.
3.NF.A.5 Recognize and generate equivalent fractions using visual models, and justify why the fractions are equivalent.
3.NF.A.6 Compare two fractions with the same numerator or denominator using the symbols >, = or <, and justify the solution.
3.NF.A.7 Explain why fraction comparisons are only valid when the two fractions refer to the same whole.

RELATIONSHIPS AND ALGEBRAIC THINKING

3.RA.A.1 Interpret products of whole numbers.
3.RA.A.2 Interpret quotients of whole numbers.
3.RA.A.3 Describe in words or drawings a problem that illustrates a multiplication or division situation.
3.RA.A.4 Use multiplication and division within 100 to solve problems.
3.RA.A.5 Determine the unknown number in a multiplication or division equation relating three whole numbers.
3.RA.B.6 Apply properties of operations as strategies to multiply and divide.
3.RA.C.7 Multiply and divide with numbers and results within 100 using strategies such as the relationship between multiplication and division or properties of operations. Know all products of two one-digit numbers.
3.RA.C.8 Demonstrate fluency with products within 100.
3.RA.D.9 Write and solve two-step problems involving variables using any of the four operations.
3.RA.D.10 Interpret the reasonableness of answers using mental computation and estimation strategies including rounding.
3.RA.E.11 Identify arithmetic patterns and explain the patterns using properties of operations.