How to Teach Earth Science with Planet Earth (BBC, 2006): A 6-Week Unit Plan
Earth Science teachers in middle and high school classrooms often want one anchor resource that holds together a multi-week biome unit. The BBC's 2006 Planet Earth series is a strong candidate — eleven 50-minute episodes, each filling a single class period, each focused on one biome or Earth system. This post lays out a 6-week sequence built around the series, with episode pairings, a focus for each week, and worksheets that students complete during the screening.
The unit fits 9th- through 12th-grade Earth Science, with applicability to AP Environmental Science. It also works for a 6th- through 8th-grade general science survey, though the depth of discussion shifts. The constraint set assumed: 50-minute class periods, limited prep time, single-screen classroom or device-based viewing, and an answer key that lets a substitute teacher run the lesson without prior preparation.
Why this series as the spine
Planet Earth covers Earth-system content with one biome per episode, narrated in transcript-friendly pacing that suits a fill-in-the-blank worksheet. The episode order in the original BBC release follows a clean survey-then-biome structure: Episode 1 introduces the latitude-to-climate-to-biome chain, and the remaining ten episodes work through specific Earth systems and biomes one at a time. The series is widely available through public libraries, school streaming services, and BBC Earth licensing — most districts already have access.
The content is secular Earth-system science: orogeny, hydrology, climate zones, biome productivity, marine ecology. No editorial agenda. That makes it portable across school types and easy to defend in any curriculum review.
The 6-week sequence
Eleven episodes across six weeks works out to one standalone screening week plus five weeks of paired episodes. The pairings group episodes by Earth-system theme so each week builds toward a coherent concept rather than running through biomes one at a time without a through-line.
Week 1 — Earth systems and biome survey
Episode 1: From Pole to Pole (50 min)
Screen this one alone. It's the survey episode and earns its own week. Episode 1 walks from Antarctica through the Arctic, the taiga, the temperate forests, the tropical jungle, the deserts, and back — establishing the latitude-to-climate-to-biome chain that the rest of the series unpacks. Pair the screening with a map activity: students mark each biome named in the episode on a world map and label the dominant climate driver for each. The worksheet (15 fill-in-the-blank questions in transcript order, single page, answer key included) is the during-screening anchor.
Open the Episode 1 worksheet → (also available as the free sample on the homepage signup form)
Week 2 — Geosphere: how Earth's solid surface shapes life
Episode 2: Mountains (50 min) + Episode 4: Caves (50 min)
These two episodes cover the geosphere as a habitat. Mountains opens with orogeny — the volcanic uplift that produces a 500-mile-wide dome in East Africa — and tracks how altitude reorganizes climate and ecology. Caves moves to karst geology, the chemical weathering that hollows out limestone and produces cave systems large enough to engulf the Empire State Building. Together they cover both uplift and erosion in the rock cycle, and both show how geological structure dictates which organisms can live where.
Discussion prompt for the pair: how does rock type (igneous, sedimentary) determine the kind of habitat that forms? Mountains and Caves give concrete examples of each.
Both episodes ship in the full Planet Earth bundle (all 11 episodes) →
Week 3 — Cryosphere and the hydrologic cycle
Episode 3: Fresh Water (50 min) + Episode 6: Ice Worlds (50 min)
The pairing treats water in two states. Fresh Water tracks the hydrologic cycle from condensation through rivers and watersheds; Ice Worlds covers the frozen 90% of the planet's fresh water locked in Antarctica and the Arctic. Putting them in the same week sets up the climate-change discussion naturally — Ice Worlds carries the strongest climate-loss content in the series, and Fresh Water provides the watershed disruption frame that makes the loss matter downstream.
Discussion prompt: trace one water molecule from a Greenland glacier through the system in 2026 versus 1906. Where does it go differently?
Open the Episode 3 worksheet → · Ice Worlds is in the bundle →
Week 4 — Climate-driven biomes
Episode 5: Deserts (50 min) + Episode 7: Great Plains (50 min)
Both episodes show climate driving biome formation along a precipitation gradient. Deserts explains why the Gobi exists — the Himalayas block moisture from reaching central Asia, a clean rain-shadow example. Great Plains picks up at the next precipitation band, where rainfall supports grass but not closed-canopy forest. The pair lets students see the continuous gradient from arid to semi-arid to grassland in one week instead of two disconnected weeks.
Discussion prompt: pull up an annual precipitation map alongside a biome map. Where do the boundaries align, and where do they not?
Both episodes are in the bundle →
Week 5 — Forest biomes by latitude
Episode 8: Jungles (50 min) + Episode 10: Seasonal Forests (50 min)
The forest-biome pair runs by latitude. Jungles covers tropical rainforests — 3% of land surface, more than half of the world's species. Seasonal Forests covers the boreal and temperate deciduous forests that circle the higher latitudes, plus the taiga that holds a third of all the world's trees. The productivity contrast lands cleanly: jungles have the highest species count, seasonal forests carry the highest biomass.
Discussion prompt: why does the equator support more species per acre than the boreal zone? Students should reference solar input, growing season, and disturbance frequency in their answers.
Both episodes are in the bundle →
Week 6 — Marine systems and unit capstone
Episode 9: Shallow Seas (50 min) + Episode 11: Ocean Deep (50 min)
The capstone week shifts to marine biomes. Shallow Seas covers the continental shelves, coral reef systems, and the productive coastal zone where most marine biodiversity lives. Ocean Deep takes students to hydrothermal vents and the abyssal zone — chemosynthetic ecosystems running on Earth's geothermal energy instead of sunlight. The pair completes the survey: terrestrial biomes anchored in weeks 2 through 5, marine biomes wrapped here.
Discussion prompt for the unit capstone: of the eleven biomes covered, which is most vulnerable to a 2°C warming scenario, and which is most resilient? Students cite specific episodes in their answer.
Both episodes are in the bundle →
Assessment and pacing notes
The worksheets run 15 fill-in-the-blank questions per episode, in transcript order, with answer keys. They function as the during-screening accountability check — students hand them in at the end of the period and they grade in under a minute each. For unit assessment, the discussion prompts at the end of each week pair well with a one-paragraph written response, which gives students a place to apply the content beyond recall. The unit capstone discussion in Week 6 can serve as the summative project, scored against a simple rubric on evidence citation.
For pacing, the 12-week-per-semester block in most US Earth Science scope-and-sequence documents accommodates this unit at the front end — covering biomes and Earth systems early — or as a mid-year survey before deeper geology or oceanography units. The 6-week block leaves room for one introductory week (terminology and map skills) and one assessment-and-review week on either side.
How to get the worksheets
The full Planet Earth bundle (all 11 episodes) is one combined PDF — student question pages first, then answer keys at the back. Print pages 1 through 11 to hand out the whole unit without printing the answer keys. The bundle is available at the Planet Earth bundle page; individual episodes are also available for teachers who only need one or two.
The free sample on the homepage signup form is the Episode 1 worksheet, which lets you evaluate the format before committing to the bundle.