About Us

Class Size Matters is a non-profit organization that advocates for smaller classes in NYC’s public schools and the nation as a whole.

Class Size Matters, 124 Waverly Pl., New York, NY 10011.

Contact us at info@classsizematters.org; 212-529-3539

The New York Times has called us the “city’s leading proponent of smaller classes.”  We are dedicated to providing information on the significant and wide-ranging benefits of smaller classes, particularly for at-risk children, to boost student learning, engagement, and graduation rates, and lower disciplinary referrals.

We also advocate for alleviating school overcrowding, and work for more parent decision-making in the area of education policy, including the ability of parents to protect their children’s privacy and control the disclosure of their personal student data.

The organization’s founder and Executive Director, Leonie Haimson, was a public school parent for 15 years.  She received the John Dewey award from the United Federation of Teachers in 2007, was named one of NYC’s “family heroes” by NYC Family Magazine in 2009, and was honored as an “Extraordinary Advocate for our Children” by Advocates for Justice in 2012.

In 2014, she received the “Parent Voice” award from Parents Across America for her work defeating inBloom and protecting student privacy.  In 2015, she was named one of the ten most influential people in education technology by Tech and Learning Magazine.

She has appeared on CNN, Fox News, MSNBC, Good Day NY, WNBC News, National Public Radio, Al Jazeera, Democracy Now, and numerous other television and radio shows. She has written for the NY Times, the Nation, Education Week, Washington Post, the Indypendent, SchoolBook, Huffington Post, Chalkbeat, In These Times, Gotham Gazette, City and State, and many other publications. She blogs at the NYC Public School Parents .

Leonie helped start Parents Across America, and currently sits on the board of the Network for Public Education.  She co-founded and co-chairs the Parent Coalition for Student Privacy.

Please make a tax-deductible donation here, or send a check to the address above. Our EIN# is 20-2169746. 

You can also subscribe to our Class Size Matters newsletter here or follow us on twitter at @classsizematter and @leoniehaimson