Mark Your Calendars!

Sessions & Breaks At A Glance

  • Session 1, 2018: 7 weeks, Aug. 27-Oct. 12
    • No OSA classes Sept. 3
    • Session break, no OSA classes: Oct. 15-19
  • Session 2, 2018: 8 weeks, Oct. 22-Dec. 21
    • No OSA classes on Monday, Nov. 12th
    • Mid-session break, No OSA classes Nov. 19-23
    • Winter break, no classes: Dec. 24-Jan. 11
  • Session 3, 2019: 9 weeks, Jan. 14-March 15
    • No OSA classes on Monday, Jan. 21, or Feb. 15th, 18th
    • Session break, No OSA classes March 18-22
  • Session 4, 2019: 8 weeks, March 25-May 31
    • Mid-session break, April 15-26
    • Outdoor Adventure with NatureBridge, Apil 14-19
    • No OSA classes Monday, May 27
  • “Session 5” Imaginession 2019: June 3-6

Upcoming Dates to Remember

Please check back frequently as this page is updated regularly.

The session schedule for One Spark Academy (a “Learning Center”) follows the calendar for the local district, CVUSD, due to our rental agreement for use of the Teen Center during non-operational hours. Classes for OSA are closed on national or observed legal holidays, not necessarily religious holidays.

A full calendar of Calendar of 2018-2019 Sessions and Breaks will be available as a PDF download in June.


  • General Pre-Registration for 2018-2019 begins.
  • Tues/Thurs, 8th & 10th: Parent Tours. Please refer to registration details before signing up. 
  • Monday, 14th: General registration for Imaginession (June 4-7). This special mini-session of creativity, arts, and sport is a great way to kick off summer.
  • Monday, 28th: Memorial Day observed. No OSA classes.


  • Friday, 1st: Last day of Session 4
  • 4th-7th: Imaginession! (“Session 5”, a mini session of imagination!)
  • Friday, 8th: the OSA Launch, our ceremonial lunch honoring those in 8th grade and older leaving OSA.
  • Fall Orientation Parent Meeting! Wednesday, June 13. Click here for details and to RSVP. This meeting is important for all returning, new, and prospective families.



  • Wednesday, 1st: General registration for Session 1 opens
  • Thursday, 23rd: Back-to-class picnic, location TBA, 5:00-7:30 PM
  • Monday, 27th: Session 1 begins (7 wks, 8/27-10/12)