The Newton Schools Foundation is looking for nominees who have made a positive impact on the city’s public schools to be honored at its Celebration of Excellence spring benefit gala on May 3. The nominees may include employees and alumni of the Newton public schools as well as business or community leaders. The nomination deadline is March 15. Submissions of 150 words or less explaining the positive impact the nominee has made on the schools must include the name and e-mail address of both the person writing the nomination and the nominee. Nominations for current or former school employees should also include the name and address of the school where they work or worked. Nominations for alumni should include the name of the school they attended, and the name of a business should be included if applicable. The gala and benefit will feature a performance by comedian Jimmy Tingle, gourmet food, and music by Loose Change, a band of Newton educators.