- Grass Lake High School
- Pre-Calculus - Mr. Coffey
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Pre-Calculus
Instructor: Mr. Coffey
Class Announcements
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For Extra Help
Need some extra help on your Algebra A, B or C? Students and parents can log in to the Holt website and you will find the textbook, lesson videos, practice tests, a graphing calculator and more.
The URL is http://my.hrw.com/
Username: bcoffey61
Password: n3j2
To access the odd answers for your textbook. Login to the Holt Website, choose your textbook, choose Student Handbook and Selected …
Class Files
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Class Links
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Graphing Calculator
Online graphing calculator -
Scientific Calculator
This site has other calcutors besides the graphing one.