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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part III, Line 2: New Services</FormAndLineReferenceDesc>
        <ExplanationTxt>Science LessonsIn 2019-20, we added three new schools to the PS Science service partnership, bringing the total schools served to 10, the classrooms served to 80, and total number of students who received weekly STEM programming throughout the school year to 2,200. As a sign of the level of appreciation for the PS Science program, all schools are continuing with their PS Science partnership in 2020-21, and in schools where we were not already serving all classrooms, we have been asked to expand to serve additional classrooms. After school closures in March 2020, we modified our K-5 lesson plans to make them simpler to do with common things found at home and created a library of instructional videos which we sent to all our classroom teachers each week to support them in conducting lessons over Zoom with their students. The PS Science instructors continued to conduct lessons through Zoom with all classes that were able to do so. We continued our after school CodeClub and our summer S-Team Rangers camp remotely, delivering materials kits to participants and meeting remotely through Zoom. Beginning in September 2019,the PS Science program provided weekly, 90-minute engaging hands-on science lessons to over 2,200 students and 80 teachers in grades K through 5 throughout the school year. We delivered all lesson materials to our partner schools each week. From August 2019 February 2020, materials were delivered each week to our 80 participating classrooms. As a product of the disruption of the COVID-19 pandemic at the PS Science Headquarters, our students and teachers (and moms, dads, baby sisters and grandparents, etc) experienced weekly science lessons in their homes. Each week, the PS Science Instructors modified our K-5 lesson plans to make them simpler todo with common things found at home, and created a library of instructional videos to help our young scientists in their investigations. We now have a full library of quality PS Science lessons and as a natural outgrowth, we created a PS Science YouTube channel and over the summer have been posting new science videos to it each week. Check it out and subscribe at https://www.youtube.com/user/PSScience. Its a great resource to stimulate STEM learning, and it is available to anyone for free!When schools closed this spring, the school Family Science Night events that had been scheduled seemed doomed. But with more creative thought, we were able to conceive of a Remote Family Science night featuring a video presentation of a friendly alien Ovo who needed help from our students to design a landing pod so he could visit earth. After an initial YouTube live presentation, students worked with their families to build and test egg drop landing pods. We held a follow-up Family Science Night presentation the following week to share the students videos of their landing pod designs with the community. It was an extremely fulfillingexperience to involve families in their children's science learning and we hope to recreate this Remote Family Science night program for more of our schools in the 2020-21 school year.PS Science now offers an after school Code Club for 4th and 5th grade students who are interested in exploring coding and programming. The club meets weekly after school throughout the school year. Participants receive a materials kit containing a micro:bit microprocessor and additional sensors and components. Most projects are based on the MakeCode website at https://makecode.microbit.org/ Students become skilled at creating code, programming sensors, testing and revising the output with lights, sounds, and other sensors. Projects will vary each semester, and have included battling robots, kinetic sculptures, robot dance contests, and more! This is an introductory club and no prior coding experience is necessary. There was one Club in this fiscal year that served 30 students.</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part III, Line 3: Ceased Conducting or Significant Changes To Services</FormAndLineReferenceDesc>
        <ExplanationTxt>Ceased:During the 2018-19 year, PS Science partnered with P.S. Arts to deliver a STEAM Science &amp; Dance program titled Science With a Twist to five classrooms in the Inglewood School District. Six classroom teachers and 150 students participated in the immersive twelve week program, receiving 90 minutes of science and 60 minutes of dance each week. The dance lessons were themed to support the concepts being learned during the science lessons. At the culmination of the program, students choreographed and performed dance routines that embodied the concepts they had learned in Science. A professional evaluation done of the program showed the students had high content retention and engagement.</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part III, Line 4d: Other Program Services Description</FormAndLineReferenceDesc>
        <ExplanationTxt>OTHER PROGRAM SERVICES 4: Code ClubPS Science now offers an after school Code Club for 4th and 5th grade students who are interested in exploring coding and programming. The club meets weekly after school throughout the school year. Participants receive a materials kit containing a micro:bit microprocessor and additional sensors and components. Most projects are based on the MakeCode website at https://makecode.microbit.org/ Students become skilled at creating code, programming sensors, testing and revising the output with lights, sounds, and other sensors. Projects will vary each semester, and have included battling robots, kinetic sculptures, robot dance contests, and more! This is an introductory club and no prior coding experience is necessary. There was one Club in this fiscal year that served 30 students.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Line 2: Description of Business or Family Relationship of Officers, Directors, Et</FormAndLineReferenceDesc>
        <ExplanationTxt>Some of the Board members are current or former employees of Crossroads School for the Arts &amp; Sciences.</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Line 8: Explanation of No Contemporaneously Documentation of Meetings</FormAndLineReferenceDesc>
        <ExplanationTxt>There are no committees with the authority to act on behalf of the Board.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Line 11b: Form 990 Review Process</FormAndLineReferenceDesc>
        <ExplanationTxt>Form 990 is prepared by an independent CPA who delivers a draft copy to the President. They review and discuss the forms. Any necessary revisions are made and a final copy is delivered to the President for signature and filing. A copy of the 990 is then made available to the Board of Directors prior to filing.</ExplanationTxt>
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        <FormAndLineReferenceDesc>Form 990, Part VI, Line 12c: Explanation of Monitoring and Enforcement of Conflicts</FormAndLineReferenceDesc>
        <ExplanationTxt>All board members annually sign a written conflict of interest statement that discloses any conflicts. To date no known conflicts have arisen.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Line 15a: Compensation Review &amp; Approval Process - CEO, Top Management</FormAndLineReferenceDesc>
        <ExplanationTxt>The Board of Directors determined the Executive Directors salary based on similar Executive Salaries in the Los Angles area. Two 3% raises have been added since 2016.All Board members are unpaid volunteers.</ExplanationTxt>
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        <FormAndLineReferenceDesc>Form 990, Part VI, Line 19: Other Organization Documents Publicly Available</FormAndLineReferenceDesc>
        <ExplanationTxt>The following organizational documents of P.S. Science are available for inspection or copying at the organization's office during normal business hours at no charge, except for a nominal copying fee:1) Tax Exemption Application2) IRS Determination letter3) Articles of Incorporation4) By-Laws5) Form 990 for the most recent and prior two years. The public inspection copy of the Form 990 will not include Schedule A excess contributors or the Schedule B.The most updated versions of all of the preceding forms will be available.When responding to a public inspection request for any organizational document or Form 990 by anyone, P.S.Science will fulfill such request in a timely fashion without inquiring as to the reason for the public inspection request.</ExplanationTxt>
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