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.



  • Wednesday, 1st: General registration for Session 1 opens. Session 1 Schedule available online.
  • Tues/Wed, 21st and 22nd: Math assessments, 9:00-11:00 AM. To reserve your day, email here.
  • Thursday, 23rd: Back-to-class picnic, 5:00-7:30 PM. Details and RSVP here.
  • Monday, 27th: Session 1 begins (7 wks, 8/27-10/12)


  • Monday, 3: Labor Day. N0 OSA classes.
  • Gameday TBA.


  • Monday 1st: General registration opens for Session 2.
  • Friday, 12th: Session 1 ends.
  • 15th-19th: Session break. No OSA classes on site. Field trips will be arranged.
  • Friday, 19th: Art Day at Art Trek! Sign up available soon.
  • Sunday, 21st: Rotary Club Street Fair. OSA will have a booth!
  • Monday, 22nd: Session 2 begins (8 wks, 10/22-12/21)
  • Wednesday, 31st: Halloween at OSA.


  • Wednesday, 7th: Drumming Night with John Lacques at Art Trek! Details coming soon.
  • Monday, 12th: Veteran’s Day. No OSA classes.
  • Friday, 16th: Generosity Campaign opens, our annual online fundraiser, through Dec. 31.
  • Friday, 16th: 8th annual OSA “Giving Thanks” Feast.
  • 19th-23rd: Mid-Session break. No OSA classes on site.


  • Winter Parent Meeting, date TBD (about Session 3 and 4). Likely dates: 12/4 or 12/5.
  • Monday, 10th: General registration for Session 3.
  • Friday, 21st: Last day of Session 2.
  • 24th- January 11: Winter Break. No OSA classes on site. Some field trips may be arranged for January.


  • 7th-11th: OSA still on Winter Break, some activities may be planned this week. (Local schools back in session)
  • Monday, 14th: Session 3 begins (9 wks, 1/14-3/15)
  • Monday, 21st: Martin Luther King, Jr. remembered. No OSA classes.


  • Parent Meeting for Outdoor Adventure participants (date TBD, likely 2/5 or 2/6)
  • Thursday, 14th: Love is in the Air evening of art at Art Trek. Details coming soon.
  • Friday, 15th and Monday, 18th: President’s Day observed. No OSA classes.

MARCH 2019

  • Monday, 4th: General registration opens for Session 4.
  • Friday, 15th: Session 3 ends.
  • 18th-22nd: Session break. No OSA classes. Some off-site activities may be planned.
  • Monday 25th: Session 4 begins (8 wks, 3/25- 5/31)

APRIL 2019

  • OSA Family Tours, dates TBD
  • Sunday, 14th- Friday, 19th: OSA on 2019 Outdoor Adventure with NatureBridge!
  • 15th-26th: Mid-session break. No OSA classes on site.

MAY 2019

  • Saturday, 4th: Spring Fundraising event! 6:00-10:00 pm. Details TBD.
  • Monday 13th: General registration for Imaginession.
  • Monday, 27th: Memorial Day. No OSA classes.

JUNE 2019

  • 3rd-6th: Imaginession!
  • 2019-2020 Parent Information Meeting, 2nd week of June. Date TBD.
  • Friday, 7th: 2019 Launch