High SchoolAges 15–16No Prep Required

10th Grade Emergency Sub Plans

No-prep emergency sub plans for 10th grade. These self-directed activities are appropriate for high school sophomores and require no setup from the substitute.

Geometric Proof Practice

25 min

Geometry

Students write two-column proofs for 5 geometric theorems (parallel lines, congruent triangles, or angle relationships) using any theorems they know.

Research Essay Outline

30 min

English/Writing

Students outline a 5-paragraph research essay on any current event or historical topic of interest, including thesis, 3 supporting arguments, and counterargument.

World War Analysis

25 min

World History

Students analyze the causes, key events, and global consequences of any major 20th-century conflict in a structured graphic organizer.

Chemical Reaction Types

20 min

Chemistry

Students classify 10 chemical reactions as synthesis, decomposition, single replacement, double replacement, or combustion, and write balanced equations for 5.

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