Clavis

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  • Cover image for The Pigpen Problem. How to Calculate Area and Perimeter

    The Pigpen Problem. How to Calculate Area and Perimeter

    $19.95

    “A practical and entertaining introduction to plane geometry” —Kirkus Reviews Join Farmer Ed and his perplexed animals as they face a puzzling task: constructing a pen for the pigs. With furrowed brows and scratching heads, they wonder: How will they even begin? Sheep steps up with her impressive math skills, but does the rest of…

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  • Cover image for The Clock Problem. How to Tell Time

    The Clock Problem. How to Tell Time

    $19.95

    A CBC Book’s August Hot Off the Press title! “Speech bubbles provide a challenging vehicle for lengthy explanations about the positioning of clock hands, but Wise otherwise keeps the countdown moving with wordplay-filled banter. Against pale-colored backdrops, Lynch’s panels amplify the story’s over-the-top style via the googly eyed characters’ antics.” —Publishers Weekly Cluck, cluck ….

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  • The Cake Problem. Equivalent and Simplified Fractions

    The Cake Problem. Equivalent and Simplified Fractions

    $19.95

    “Entertaining, goofy illustrations, quick reviews of equivalent and simplified fractions, and a few practice problems effectively round out this fun refresher.” –Booklist A CBC 2026 KIDS FAVORITES Winner! Farmer Ed brings Sheep, Chicken, and Goat a chocolate cake. Delicious! But hold on; it’s not a circle or rectangle, like most cakes. Dividing this cake is…

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  • Cover image for El Problema del Reloj: ¿Qué Hora Es?

    El Problema del Reloj: ¿Qué Hora Es?

    $19.95

    Un cómic graciosísimo que muestra lo divertido que pueden ser las matemáticas. Para fanáticos y no tan fanáticos de las matemáticas, a partir de los 7 años. Tic-tac . . . tic-tac . . . tic-tac . . . Pollo no sabe cómo leer la hora en el reloj análogo. Por eso llegó tarde a…

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  • El Problema del Pastel. Fracciones Equivalentes Y Simplificadas

    El Problema del Pastel. Fracciones Equivalentes Y Simplificadas

    $19.95

    “Entertaining, goofy illustrations, quick reviews of equivalent and simplified fractions, and a few practice problems effectively round out this fun refresher.” –Booklist El granjero Ed les lleva un pastel de chocolate a Oveja, a Pollo y a Cabra. Qué rico! Pero espera, el pastel no es ni un círculo ni un rectángulo, como la mayoría…

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