Common Core
EngageNY - www.engageny.org
Exam Preparation
New York State Regents Exams - http://www.nysedregents.org/
Jefferson Math Project - http://www.jmap.org/
Computer Science
AP Central: AP Computer Science A - https://apcentral.collegeboard.org/courses/ap-computer-science-a/course
AP Computer Science Java Subset - https://secure-media.collegeboard.org/digitalServices/pdf/ap/ap-computer-science-a-java-subset.pdf
AP Course Audit - http://www.collegeboard.com/html/apcourseaudit/index.html
Rosetta Code - http://rosettacode.org
American Computer Science League - http://www.acsl.org/
Cyber.org - https://cyber.org/
Statistics
Ask Good Questions: A blog about teaching introductory statistics - https://askgoodquestions.blog
Art of Stat Web Apps - https://artofstat.com/web-apps
StatCrunch: Interactive Applets - https://www.statcrunch.com/applets
Skew the Script - https://skewthescript.org
JASP - https://jasp-stats.org/
jamovi - https://www.jamovi.org/
Online Tools
Huo's Coding Lab - http://codinglab.huostravelblog.com/
The On-Line Encyclopedia of Integer Sequences - https://oeis.org/
Picker Wheel - https://pickerwheel.com/
Plickers - https://plickers.com/
Overleaf - https://www.overleaf.com/
whiteboard.fi - http://www.whiteboard.fi
mentimeter - https://www.mentimeter.com/
codeshare.io - https://codeshare.io/
app.diagrams.net - https://app.diagrams.net/
Online Textbooks
OpenStax College - https://openstaxcollege.org/
University of Florida Biostatistics Open Learning Textbook - http://bolt.mph.ufl.edu/
Online Documents
Microsoft Office Equation Editor Shortcut Commands - http://www.iun.edu/~mathiho/useful/Equation%20Editor%20Shortcut%20Commands.pdf
Online Learning
MITx - https://www.edx.org/