Resource license
Free to use.
Clear to share.
All original papers, worksheets, illustrations and answer sheets in this collection are available under Creative Commons Attribution 4.0 International.
Personal, classroom & commercial use.
Credit, link & change notice.
Print, share and adapt
You can copy and redistribute the original resources, and adapt them for your own work, including commercial uses, under CC BY 4.0. There is no resource fee and no separate classroom-use license to purchase.
When redistributing, give appropriate credit, link to the license and indicate whether you changed the material. Do not suggest that Grid & Form endorses your adapted version. The summary here does not replace the official CC BY 4.0 terms.
A credit you can copy
“[Resource title]” by Grid & Form, revision r1. Licensed under Creative Commons Attribution 4.0 International: https://creativecommons.org/licenses/by/4.0/ . [Describe changes, or state “Unmodified.”]
For an unmodified printed worksheet, retain the credit and linked license already in its footer. If you extract or adapt an illustration, keep the attribution with the new material. Use https://zumola.com as the source website. Revision r1 files retain their original Grid & Form attribution; Zumola is the current site name.
What this covers
This license covers the original graph-paper layouts, vector illustrations, block models, problem text, worked solutions and printable resources authored for this project. It does not claim rights over third-party names, linked documentation, or tools used to create the files.
Printable PDFs embed Bitstream Vera fonts under their own license. Read the font copyright and permission notice. The resource license does not replace third-party software or font licenses.
Revision and responsibility
The first resource revision is r1. An edited SVG may have different dimensions or answers from the original. Mark your changes, recalculate altered problems and run a print-scale check before using an adapted measured drawing.
The materials are provided without warranties. They are general learning resources, not specifications for safety-critical work. Full license terms and limitations are defined by the linked Creative Commons license.