Goblins vs. DeltaMath

DeltaMath docks points for formatting, not math, often enough that guides written for stuck students call format errors the main way points get lost. A decimal where the checker wanted a simplified fraction, √12 left unsimplified instead of 2√3, a parenthesis that changes how the entry parses. Goblins reads the written steps and hears the reasoning behind them, so correct thinking gets credit and a notation slip becomes a quick teaching moment instead of a silent deduction.

The sharpest published review of DeltaMath says it never tells students what they got wrong, so they repeat the mistake. Teachers genuinely rate the depth, 2,500 plus skill modules from middle school through calculus with real teacher authoring, but that review, from a special education teacher on Common Sense Education, is specific.

• Every miss stacks five more questions onto the assignment.
• The reviewer measured low learning rates and engagement, with post-miss explanations often poorly written and unhelpful.

Goblin starts where that review says DeltaMath stops. It tells the student exactly where the thinking went wrong, then teaches it.

No independent randomized study of DeltaMath exists.

• The one published comparison, a classroom case study from South Tangerang, found DeltaMath users scored no better than non-users.

Practice software earns its keep in the moment a student is stuck, and that moment is exactly what Goblins was built for.

Yes. The live classroom view shows every student's work as it happens, so you know who is stuck this minute and can pull a small group on the spot. You also get session replays of the written work and the full tutor conversation for every problem. DeltaMath's per-question analytics tell you afterward who missed what. Goblins tells you now.

DeltaMath publishes its price list, and no tier includes a tutor that watches the work or asks a student what they were thinking.

• Per DeltaMath's published national list pricing, PLUS runs about $125 per teacher per year, INTEGRAL about $225, and district licenses about $17.65 per student per year.
• Every paid tier buys deep practice content, auto-grading, help videos, and hints, not a tutor.

Goblins is free for teachers, with 15 live help-enabled problems per student each month, worksheet uploads, standards-aligned assignments, and teacher avatars included, no credit card. Goblins Max, priced per school or district, makes live help unlimited and adds standards and engagement reporting.

Goblins supports whatever language your students think in. We never cap it at a number, students speak and draw in their language and Goblin keeps up, and we add new languages whenever a classroom asks.

Yes. Goblins complies with COPPA, FERPA, and student data privacy laws in all 50 states.