An ocean-themed math and reading adventure for grades 1–6. Join Scuba Bob and his crew on 360 interactive lessons and stories across six incredible ocean zones.
Every lesson is a new dive into the ocean. Complete quizzes to unlock stories, earn badges, and explore deeper waters.
Choose your grade level and enter your ocean zone. Each zone has a unique underwater world to explore.
Each lesson teaches a math or reading concept with ocean-themed examples. Answer 8 questions to prove your skills.
Complete 5 lessons to unlock an epic adventure story. Finish all 50 lessons and 10 stories to graduate!
Each grade unlocks a deeper part of the ocean. Start at the sunny Shallow Shore and dive all the way to The Trench.
Warm, sunny waters where Scuba Bob learns to count, add, subtract, and read his first sentences. Perfect for ages 6–7.
Colorful corals and creatures introduce place value, regrouping, story elements, and writing paragraphs. Ages 7–8.
Dense kelp forests hide multiplication, fractions, text features, and research writing challenges. Ages 8–9.
Vast blue waters introduce long division, decimals, multi-paragraph essays, and figurative language. Ages 9–10.
Bioluminescent creatures guide you through order of operations, coordinate planes, argumentative writing, and poetry. Ages 10–11.
The deepest waters challenge you with ratios, integers, algebraic thinking, literary analysis, and research papers. Ages 11–12.
Everything kids need to learn math and reading — wrapped in an ocean adventure they'll actually want to do.
Each zone spirals through concepts 3 times — introducing, deepening, then mastering. No child gets left behind.
See exactly which lessons and stories are complete. Visual progress bars for every zone and every child.
10 adventure stories per grade weave math and reading concepts into narratives kids love.
Earn badges for streaks, perfect scores, and zone completion. Collect them all to become a Master Explorer.
Wrong answer? A friendly explanation pops up with encouragement and the right approach to try again.
Parents see their child's progress, strengths, and areas to improve — all from a simple, clean dashboard.
Real feedback from parents whose kids are diving into learning every day.
My daughter asks to do her MarineHQ lessons before anything else. She's gone from struggling with subtraction to doing it confidently — and she talks about Scuba Bob like he's a real friend.
As a teacher, I've recommended MarineHQ to every parent at conferences. The spiral curriculum actually works — kids retain what they learn because they see concepts multiple times.
My son is in 5th grade and actually reads the stories for fun. The fact that he's learning fractions and literary analysis while thinking he's on an ocean adventure? That's the dream.
360 lessons and stories are waiting. Pick a grade, grab your goggles, and start your ocean learning adventure today.
🌊 Start Your Adventure