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Mastery CS John Wister Elementary

Philadelphia, PA · Mastery CS John Wister Elementary · Grades K–5

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Published by Mastery Schools. Last verified November 13, 2026. View the original calendar

Wed, Nov 25 · All day — Thanksgiving Break
Thu, Dec 3 · 12:30 PM — Mastery Parent Action Team (MPAT) Meeting · https://masterycharter.org/event/mastery-parent-action-team-mpat-meeting-2/
Fri, Dec 11 · All day — Professional Development Day
Wed, Dec 23 · All day — Winter Break Early Release
Thu, Dec 24 · All day — Winter Break
Wed, Jan 6 · All day — Three Kings Day
Mon, Jan 18 · All day — Martin Luther King Jr. Day
Fri, Jan 22 · All day — Professional Development Day
Tue, Feb 9 · All day — Report Period 2 Report Card Conferences
Wed, Feb 10 · All day — Report Period 2 Report Card Conferences NJ (9-12)

Mastery CS John Wister Elementary athletics calendar (district-wide)1 upcoming event

Published by Mastery Schools. Last verified November 13, 2026. View the original calendar

Mastery CS John Wister Elementary — Mastery Schools 2026 - 2027 CALENDAR (district-wide)11 upcoming events

Published by Mastery Schools. Last verified November 13, 2026. View the original calendar

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Mastery CS John Wister Elementary Calendar — Philadelphia, PA · Chaos Coordinator