Critical Thinking Online Breakouts across the Texas science TEKS — from light & shadows in Kindergarten to conservation of mass in Grade 8. Each grade page holds a featured breakout, a set of short concept breakouts (one per key idea), a hands-on STEM engineering design challenge, and a student word bank. Choose a grade to begin.
Light & shadows, sorting, magnets, day & night, the sky, rocks, weather, air & wind, plant & animal needs, and plant parts. Featured: Light and Shadows.
Open Kindergarten → Grade 1 · §112.3Pushes & pulls, sorting, hot & cold, seasons, soil, water, weather, living things, food chains, and animals. Featured: Push, Pull, and Play!
Open Grade 1 → Grade 2 · §112.4Sound & vibrations, solids & liquids, pushes, Sun & Moon, wind & water, wild weather, recycling, food chains, and metamorphosis. Featured: Make Some Noise!
Open Grade 2 → Grade 3 · §112.5The solar system, states of matter, forces at a distance, energy, soil, rapid Earth changes, food chains, fossils, and survival structures. Featured: Blast Off!
Open Grade 3 → Grade 4 · §112.6Circuits, mixtures & solutions, energy transfer, conductors, Moon phases, the water cycle, erosion, weather vs. climate, resources, food webs, and traits. Featured: Light It Up!
Open Grade 4 → Grade 5 · §112.7Earth's spin & shadows, separating mixtures, particles, forces, energy transformations, light, sedimentary rock, landforms, ecosystems, and behavior. Featured: Round and Round.
Open Grade 5 →Matter & density, forces, energy, Sun–Earth–Moon, Earth's systems, and ecosystems. Featured breakout: Cargo Ship Rescue.
Open Grade 6 → Grade 7 · §112.27Motion & graphs, speed vs. velocity, thermal energy, the solar system, plate tectonics, and ecosystems. Featured breakout: Rescue Run.
Open Grade 7 → Grade 8 · §112.28Chemical reactions & conservation of mass, forces, waves, stars & the universe, weather & climate, and heredity. Featured breakout: Launch Control.
Open Grade 8 →