Digital files are not eligible for return and are final sale once they have been emailed to you.

This ebook is not an immediate download and will be sent in a separate email in 1-3 business days. You will receive instructions for how to access your account and eBook. The PDF is downloadable up to 5 times within the 12 month period of access. If you wish to have access longer, please download and save to your device once you receive it. This download is only for personal use and cannot be forwarded or shared to others.


Developmental Math is designed for students to cover mulitple levels per academic year, completing 16 levels over the course of Kindergarten to Grade 7/8. Levels 17-20 can be completed afterwards, or you can make the switch to a more complete high-school math curriculum.

Developmental Math: Level 19 eBook Set (12 month access)
Grade 9 to 12
Geometry 1: Foundations of Geometry

Level 19 of the Developmental Mathematics program, trusted by educators and parents since 1993, enables students aged 14-18 to master foundational geometry concepts & develop natural problem-solving through hands-on activities and real-world applications.

With over 200 interactive exercises, this 9th, 10th, 11th, and 12th-grade math curriculum fosters independent learning in students while equipping parents with the supplemental math and homeschool resources they need to prepare young minds for long-term academic success.

This level teaches basic geometry concepts, triangles and quadrilaterals, polygons and circles, and geometric constructions and transformations.

This Level 19 eBook Set includes:

• One 80-page Workbook
• One Solutions Manual (for parents and teachers)
• One Diagnostic Test
• One Diagnostic Test Solutions Manual

Student Workbook Sample Pages

Solutions Manual Sample Pages