The Root System is a clear roadmap of how children grow — from recalling facts at the kitchen table to deep, independent thinking they carry for life.
See how it worksOne framework · Kindergarten through 12th grade · No jargon required
Most curriculum tells you what to cover, but not whether your child's thinking is actually getting deeper. The Root System makes that growth visible — so you never have to wonder if a lesson was "rigorous enough."
busy, but not growing
visible, deliberate growth
Underneath the Root System is a simple idea: every learning task can be described by three dimensions. Turn any one of them up, and the same lesson asks for deeper thinking. Together they're your toolkit for judging — and adjusting — the rigor of anything you teach.
the action
What is your child actually doing with an idea? Recognizing it on a page is the first rung. Creating something new with it — and carrying it into new situations — is the top. The verb tells you which rung a task sits on.
the space
Where does the thinking happen? Some tasks live in the hands — counting real objects, pointing at a sentence. Others live in pictures, then in pure ideas, then in your child's awareness of their own mind, until understanding becomes quiet intuition.
the complexity
How rich is the material itself? An isolated fact is the simplest unit. Facts connect into concepts, concepts into step-by-step procedures, and procedures into flexible strategies your child can adapt when nothing looks familiar.
For parents who want the full picture: each dimension is a complete ladder. Cross them — 8 verbs × 5 zones × 4 depths — and you get all 160 "I can" statements of the Root System, each introduced at the developmental stage where a child is ready for it, from kindergarten through 12th grade.
Every statement is mapped to the grade where it first appears — so you always know what's developmentally right on time.
Browse all 160 statements, K–12Rigor isn't only in the task — it's also in the material. Here's the one idea that changes how you pick books:
Watch one kitchen-table reading target — "I can find evidence for how a character feels" — grow through three books your family might already own:
Short sentences. Familiar words. One idea at a time, and feelings stated plainly — "Toad was worried."
Points to the exact sentence that shows the feeling. The evidence is right there, and finding it builds the habit of proving an answer from the text.
Longer sentences that carry more than one idea. Feelings are shown through what characters do and say, not announced.
Collects clues across the page — an action here, a line of dialogue there — and puts them together to name a feeling the author never states outright.
Layered prose where word choice, tone, and what's left unsaid all carry meaning. The author trusts the reader to notice.
Weighs subtle evidence, forms a judgment about what a character feels, and defends it — the same independent thinking the whole Root System grows toward.
Everything on this site is free to explore. Start wherever today's lesson needs you.
All 160 "I can" statements, organized by the grade where each first appears. See exactly where your child is — and what comes next.
Open the K–12 map →Age-by-age reference cards showing how writing itself grows more complex — so you can match any book to your reader with confidence.
Open the database →Paste a passage from any book on your shelf and see where it lands — then decide whether it's the right stretch for this season.
Analyze a passage →