Group items matching

in title, tags, annotations or url

Number Rack facilitates the natural development of children's number sense. The movable, colored beads encourage learners to think in groups of fives and tens, helping them to explore and discover a variety of addition and subtraction strategies. This virtual version of the manipulative is an open-ended educational tool, ideal for elementary classrooms and other learning environments that use iPod Touches, iPhones, or iPads. Display 1 to 5 rows of beads, 10 beads per row. On the iPad, display up to 10 rows. Hide beads with the resizable shade, which allows teachers or learners to model subtraction or difference problems. Reverse the colors of rows 6 to 10 to distinguish (or not) groupings of 25 beads. Use the drawing tools to annotate work and show understanding Write equations and expressions with the text tool.

"I have discovered multiple examples of how technology is changing not only how training is delivered, but also how professional learning is personalized to support and engage each educator."

"Assign problems, not tasks. Traditionally, people on the business side come up with ideas and hand them to developers who are tasked with turning them into code. Instead, let developers contribute to the solution of business problems. Who knows better how to apply software to your business than people who deeply understand technology? Tolerate failure. Experimentation is the prerequisite to innovation. Create an environment where developers run lots of small experiments and where failure is celebrated rather than punished. Run blameless post-mortems to discover why an experiment failed and what you can learn from that experience. Become obsessed with speed. Startups push new code constantly, every day. Companies can no longer spend months developing new programs. Hunt relentlessly for ways to shave the time it takes to go from "great idea" to working production code. Keep developers close to customers. Remove organizational barriers that separate developers from the people who actually use their software. When developers talk to customers they can deliver better, more useful features in less time. Every organization will embrace the builder's mindset in its own way. But these principles provide a framework for building a world-class software development organization, so you can respond faster to customer needs, adapt to a constantly changing market, and keep up with the Amazons of the world. "