149 Common Core-aligned skills for grades 1-5. Every one comes as three packs - Support, On Level and Challenge - so your whole class works on the same skill at the right level.

WHAT YOU GET

• 447 printable packs (149 skills x 3 levels)
• 1,341 worksheets, each followed by its own answer key
• 19,183 problems, checked by 3,945 automated tests
• 5 placement screeners with item-to-skill-to-pack routing
• 5 mixed review sets for spiral practice
• Error-analysis (MP.3) packs for every grade
• A Start Here contents PDF with teacher notes and standards

THE THREE LEVELS
Support: smaller numbers, no regrouping, a worked example, a strategy tip, and a shorter page.
On Level: the full grade-level expectation.
Challenge: regrouping, unknowns in any position, multi-step and explain-why items, plus a Show Your Thinking task with a rubric on the key.

NOT CLIP ART
Clocks, coins, rulers, protractor angles, bar graphs, line plots, number lines, coordinate grids, arrays, fraction models and unit cubes - all drawn to the numbers in the problem.

HONEST ABOUT WHAT THIS IS
Each pack practices the part of its standard named in its title. A practice and review library, not a full curriculum - it pairs with your core program. Every page header shows its standard code.

FORMAT
Print-ready US Letter PDFs. Five ZIPs, one per grade. Nothing to install.

LICENSE
One teacher, unlimited students, unlimited years.