Built for the Kenyan CBC Curriculum

Your child's best revision partner for Junior Secondary

Study notes, quizzes, and AI tutoring for all 9 CBC subjects. Grade 7 to 9. Works offline. Free to start.

Try a Lesson Free → Download App

CBC Subjects

Grade Levels

500+

Lesson Topics

study smart ↓

pass your exams!

✓ ✓ ✓

Grade 7 · Term 1 · Week 3

📖 English

🔢 Math

🔬 Science

🗣 Kiswahili

🌍 Social Studies

🎨 Creative Arts

🌾 Agriculture

⚙ Pre-Tech

English Mathematics Integrated Science Kiswahili Social Studies Religious Education Agriculture & Nutrition Pre-Technical Studies Creative Arts & Sports English Mathematics Integrated Science Kiswahili Social Studies Religious Education Agriculture & Nutrition Pre-Technical Studies Creative Arts & Sports

Why CBC Hero?

Everything a Kenyan student needs to excel

📝

Deep Study Notes

Comprehensive notes for every strand and sub-strand, aligned to the KICD syllabus. Clear explanations with diagrams.

🎯

Topic Quizzes

Test yourself after every lesson. Instant feedback with KNEC-style grading: Exceeding, Meeting, Approaching.

🗣

Mwalimu AI Tutor

AI teacher that speaks like a real Kenyan teacher. Explains topics, asks questions, and encourages you in Kenyan English.

🌐

Language School

Learn French, German, Mandarin, and Arabic with voice-guided lessons. Perfect pronunciation with native speakers.

📊

Progress Tracking

Track mastery across all subjects. Earn certificates when you complete strands. See your growth over time.

📱

Works Offline

Download lessons and study without internet. Perfect for students in areas with limited connectivity.

Try it now — no account needed

Experience a real CBC lesson

Photosynthesis in Green Plants

📚 Strand: Living Things 📖 Sub-strand: Plant Nutrition ⏱ 15 min read

What is Photosynthesis?

Photosynthesis is the process by which green plants make their own food using sunlight, carbon dioxide, and water. This process takes place in the leaves, specifically in tiny structures called chloroplasts which contain a green pigment called chlorophyll.

Key Formula:
Carbon dioxide + Water → Glucose + Oxygen
6CO₂ + 6H₂O → C₆H₁₂O₆ + 6O₂

Requirements for Photosynthesis

Sunlight — provides the energy to drive the reaction
Carbon dioxide — absorbed from the air through tiny holes called stomata
Water — absorbed from the soil through the roots and transported via the xylem
Chlorophyll — the green pigment that captures light energy

Why is Photosynthesis Important?

It produces food (glucose) for the plant and other organisms
It releases oxygen into the atmosphere which all living things need to breathe
It removes carbon dioxide from the air, helping to keep our atmosphere balanced

All Junior Secondary levels

Choose your grade

Grade Seven

English, Kiswahili, Mathematics, Integrated Science, Social Studies, CRE/IRE, Agriculture, Pre-Technical, Creative Arts

9 subjects · 100+ topics

Grade Eight

All 9 CBC subjects with deeper content, strand exams, and comprehensive revision notes

9 subjects · 120+ topics

Grade Nine

KNEC exam preparation, full syllabus coverage, practice papers, and certificate awards

9 subjects · 150+ topics

What parents and students say

Trusted by Kenyan families

★★★★★

"My daughter's Science grades improved from Approaching to Exceeding in just one term. The study notes are so clear and the quizzes really help."

Grace Wanjiku

Parent, Nairobi

★★★★★

"I love the Mwalimu voice — it feels like having a real teacher at home. I use it every evening to revise before exams."

Brian Ochieng

Grade 8 Student, Kisumu

★★★★★

"Finally an app that follows the actual CBC syllabus! Not some random content — everything matches what my students learn in class."

Teacher Kamau

JSS Teacher, Nakuru

Get started today

Start revising for free

Download CBC Hero and give your child the revision partner they deserve. All 9 subjects. All 3 grades. Free to start.



▶