Regrouping Lab — Virtual Base-Ten Blocks for Addition & Subtraction (Grades 1–4)

Stop modelling 47 − 19 on the board and then handing out different numbers.

Regrouping Lab is virtual base-ten blocks for addition and subtraction — built for your projector or interactive whiteboard. What no other manipulative does: one tap prints a worksheet of the exact problems on your board.

Every printed sheet carries a 4-character set code. Print at your desk, walk to the board, type the code, and the class works the same numbers you're modelling — problem by problem, together.

What you get

• Interactive base-ten blocks: ones, tens, hundreds and thousands
• Addition and subtraction — 2-, 3- and 4-digit problems
• Blocks and the written algorithm side by side: carries, struck-through digits and borrows appear as students move blocks
• Grid-paper worksheets with answer keys — 6 or 8 problems, 655,000+ variations
• Teacher Mode: 6 levels including mixed review and blank grid paper
• The Hungry Monster — gives subtraction regrouping a reason kids actually feel (and switches off for older classes)
• Built-in pen, undo, and show-answer — safe to use live in front of a class
• Set your district's wording: Regroup / Trade & Break / Compose & Decompose
• English, Español, Français, Português — including the printed sheets

Standards: 1.NBT.C.4 · 2.NBT.B.5 · 2.NBT.B.7 · 3.NBT.A.2

No student accounts. No student data collected. Nothing to install. Runs in any browser — interactive panel, Chromebook, laptop or tablet — and keeps working offline.

How access works: you'll get a licence key by email. Paste it once into the tool and that device stays unlocked — no renewals, nothing to cancel. Use the same key on every device you teach from.

One-time purchase. Yours to keep, with free updates. 30-day refund, no questions asked.

Built by a teacher, for teachers. MySchoolHero.com