Mystery Science

Mystery Science

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Recommended Ages

K–5th grades

Mystery Science offers open-and-go science lessons for roughly K–5, built around high-quality videos, curious questions, and simple hands-on activities using common household items. Created by former classroom teacher Doug Peltz and his team, each lesson starts with a real-world mystery and then guides kids through investigation, discussion, and a culminating project. Parents love the minimal prep, printable materials, and the way the videos model enthusiastic scientific thinking, making it easy to teach science even if you don’t feel like a “science person.” It’s not a textbook-style curriculum, but as a primary or supplemental spine, especially for families short on time, it’s an excellent value.

Ideal for K–5 kids who are naturally curious and love short videos, stories, and simple experiments—especially in families where the teaching parent doesn’t feel confident planning science on their own. It works particularly well for secular homeschoolers who want NGSS-style, phenomena-based lessons a few times a week without committing to a big textbook or lab kit.

Pros

Parents rave about the truly open-and-go design: short, high-quality videos front-load a question (“Why do we have seasons?”) and then walk kids through simple, hands-on investigations with household supplies, making real science feel doable at the kitchen table. The lessons are secular, visually polished, and full of kid-friendly wonder, so many children who “hate science worksheets” light up during Mystery Science days.

Cons

Homeschoolers often note that it’s strongest as a supplement, not a full K–8 spine—coverage is uneven by grade level, and there’s limited long-term review and assessment. Units are geared toward classroom use, so you may need to adapt group activities for one or two kids, and families without easy access to basic supplies (cardboard, tape, recyclables) can find some lessons annoying to prep.

Mystery Science explicitly supports homeschool charter purchases and works with charters on individual or group memberships, though eligibility still depends on your state and specific school.

$89/year on Mystery Science

Mystery Science
$89.00 USD

Skills

What kids will learn

Mystery Science Mission

The mission of Mystery Science is to help every child stay wildly curious about the world by giving teachers and parents ready-to-go science lessons that feel like watching a favorite show. Short, story-driven videos hosted by "Mystery Doug" lead directly into hands-on investigations and discussion prompts, all aligned with NGSS and state standards and designed to require almost no prep. By removing the barriers that keep many adults from feeling confident teaching science, Mystery Science aims to ensure that every elementary student experiences joyful, rigorous, inquiry-based science learning.

Mystery Science Story

Mystery Science began when Doug Peltz, an award-winning elementary science teacher known to his students as "Mystery Doug," started making simple online videos to answer kids' big questions like "Why is the sky blue?". He teamed up with entrepreneur Keith Schacht to turn those lessons into a full curriculum, blending Doug's classroom experience with Keith's background in building engaging digital products. Launched in the mid-2010s, Mystery Science quickly spread through word of mouth, becoming a staple in classrooms and homeschools before joining the Discovery Education family to reach even more learners. The team continues to release new units, adjust to updated standards, and respond directly to questions submitted by kids around the world.

About Modular Learning

FAQ: Additional Details about Mystery Science

In a typical lesson, the narrator poses a big question, kids watch crisp video clips, then you spread newspaper on the table and they mix, pour, or build with household items while talking about what they observe.

Mystery Science is a K–5 video‑based science curriculum; you log into your membership, pick a “mystery,” press play, and the lesson guides kids through engaging videos, discussion prompts, and a hands‑on activity using simple supplies.

Parents or caregivers hit play, pause when prompted for discussion, supervise experiments, and help manage cleanup; older kids can do more independently but still benefit from you joining the demos.

Kids should be able to listen to 10–20 minute videos, follow directions, and—when activities include writing—compose short responses; reliable internet and a printer are very helpful.

Mystery Science offers high‑engagement video lessons and simple hands‑on activities, making it very friendly for ADHD, autistic, and younger kids who need concrete demonstrations. Many families adapt labs using household materials and pause videos frequently so slower processors or anxious learners can keep up.

Mystery Science delivers most content through high-quality videos and guided hands-on investigations rather than long textbook readings, which makes science much more accessible for dyslexic learners. Printed materials are minimal and easy to read aloud or adapt, so kids with reading challenges can focus on understanding concepts instead of struggling through dense text.

Mystery Science pairs highly visual video lessons with simple, hands-on experiments, giving sensory-seeking kids clear structure plus chances to touch, build, and observe real materials.

Mystery Science highlights that special‑education teachers successfully use its lessons with students who have a wide range of abilities, and features like closed captions, transcripts, adjustable video speed, and highly visual, step‑by‑step activities make it especially supportive for children with processing, comprehension, or language challenges.

Often a hit with 2e kids who ask a million “why” questions. Short videos plus hands‑on activities let analytical, curious learners dive deep without needing to slog through long readings; you can scale writing up or down as needed.

Mystery Science delivers most content through high-quality videos and guided hands-on investigations rather than long textbook readings, which makes science much more accessible for dyslexic learners. Printed materials are minimal and easy to read aloud or adapt, so kids with reading challenges can focus on understanding concepts instead of struggling through dense text.

Digital memberships are generally non‑refundable once purchased, but there is a truly free trial that expires automatically without payment, and Mystery Packs are sold as final sale with no refunds or returns.

Not ideal as a sole resource for high school, for teens craving deep, math-heavy science, or for families wanting a very classical, text-and-notebook approach. It can also be a poor fit if your child strongly dislikes videos or can’t handle the mild mess and noise that come with hands-on activities.

For a fuller secular science track, families often combine Mystery Science with REAL Science Odyssey, Pandia Press timelines, or Science Mom video courses; for more experiment-heavy boxes, MEL Science and KiwiCo’s science crates are common alternatives.

Discovery Education continues to add mysteries, refine standards alignment, and offers a homeschool membership that provides full K–5 access through a defined school‑year window. 

Skim each “mystery” on Sunday, gather that week’s supplies in a single bin, and aim for one lesson split across two days—video and discussion one day, investigation and a quick notebook sketch the next—to get more retention without adding overwhelm.

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Meet Doug and Keith

Doug Peltz is a former classroom teacher who spent years refining inquiry-based lessons that helped his students see science everywhere in daily life, while Keith Schacht is a serial entrepreneur and product leader with experience at high-growth technology companies. Together they co-founded Mystery Science to combine Doug's talent for explaining complex ideas in kid-friendly ways with Keith's expertise in designing scalable, easy-to-use digital tools. Their partnership has produced one of the most widely used elementary science resources in the United States, now part of Discovery Education, while Doug's weekly "Mystery Doug" question videos continue to nurture curiosity for millions of children.