Lattice Multiplication vs Reading Skills 3A

Lattice Multiplication helps students learn and practice the lattice multiplication method step by step. The app shows each part of the lattice multiplication process visually. Students first complete the multiplication steps and then add along the diagonals. Animated numbers move into the correct places, helping students understand how the method works. Lattice multiplication is a compact visual method for multiplying larger numbers. It is algorithmically equivalent to long multiplication and is also excellent times tables practice. Students can solve randomly generated problems or enter their own multiplication problems. Wired.com: “This was one form of multiplication that I’d never done before, but the app taught me very clearly. It makes multiplying large numbers easier, and allows you to see it all visually.” Teacher endorsement: “The math apps by Esa Helttula allow students to practice and reinforce the specific computation strategies taught in class, with as much or as little scaffolding as necessary. They also provide individualized feedback to each student, with an immediacy that is not always possible through pencil and paper practice.” — Rita Zeni, Ecole Sandy Hill Elementary, Abbotsford, BC, Canada Features: - Step-by-step lattice multiplication practice - Multiplicand can have up to 5 digits - Multiplier can have up to 3 digits - Randomly generated or manually entered problems - Current operation for each step can be hidden - Operands for the current operation can be highlighted - Three visual themes: black, gray, and gold - Adjustable animation speed - Different interfaces for iPhone and iPad The Lattice Multiplication Method Lattice multiplication is algorithmically equivalent to long multiplication. A lattice (a grid) guides the calculation. All the multiplications are done first and then the additions. The method was introduced to Europe in 1202 in Fibonacci's Liber Abaci. In this groundbreaking book Fibonacci presented many algorithms for working with Arabic numerals. Ancient Indians and Chinese originally invented some of the algorithms. Fibonacci presented both the current standard long multiplication and also an originally Indian method called lattice multiplication, which is faster and more compact for working with larger numbers. Other iDevBooks Math Apps: Other iDevBooks math apps include Column Addition, Long Multiplication, Long Division, Column Subtraction, Visual Multiplication Table, Fraction Math, Partial Differences Subtraction, Partial Quotients Division, Partial Sums Addition, Decimal Rounding, and more. Feedback: New ideas to make this app better are welcome. Please visit idevbooks.com to give feedback. Privacy: This app has no ads, no in-app purchases, and does not transmit user data during operation. The app also does not contain links to other apps or to the web.

Did you know that chocolate comes from the fruit of a tree? Have you heard of a moth that sucks blood? Or a plant that eats animals? Do you need a robot to play with your dog? Reading Skills 3A is a collection of nonfiction passages with interactive learning activities, written by children's author Marne Ventura, M.A. and developed by Fred Ventura, Ph.D. This app is the first in the Reading Skills Series published by Ventura Educational Systems. Understanding informational text is essential to literacy. To help young readers develop this skill, twelve fun, high-interest passages about plants, animals, space and technology, written at the third grade reading level, are presented: • Make Way for Elephants • The Chocolate Tree • The Tail Trick • Plants Strike Back • The Tiniest Vampire • Eat Your Vegetables • Poor Pluto • Stars and Planets • Float or Sink? • Sticky Feet Space Robot • A Robot for Your Dog • Robot Friend Each passage is followed by three engaging activities based on the following Common Core Standards for Grade 3 Language Arts: • comprehension • vocabulary • main idea and supporting details • drawing conclusions • making inferences • summarizing • synonyms and antonyms • multiple meanings words • fact vs. opinion • genre • author's purpose • compare and contrast • text features The Reading Skills 3A follow-up activities for each of the 12 passages are described below: Word Fun - a clue is given along with the scrambled letters of a vocabulary word from the passage. The challenge is to unscramble the letters to spell the word. Science Facts - helps improve recall and comprehension. Students read a statement and tap either True or False based on the contents of the passage. Skills Practice - Students practice reading comprehension skills by answering multiple choice questions. A record-keeping component keeps track of the student’s scores on all of the activities.